Document:

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                                                                   EXHIBIT 10.64

                                   Mietvertrag

                                    ZWISCHEN

Vormieter:                    Basier Kantonalbank

                                    Postfach

                                   4002 Basel

                                       und

Mieter:                    Discovery Technologies AG

                               Gewerbestrasse 14

                                 4123 Allschwil

betreffend:     Buro/Laborraume in der Liegenschaft - II. Etappe

                                Gewerbestrasse 14

                                 4123 Allschwil

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1.      PRAAMBEL

        Die Parteicn vereinbaren die Miete von Raumlichkelten an der
        Gewerbestrasse 14 in Allschwil. Mit dem Grundmietzins wird das
        Uberlassen dieser Raumlichkelten im (heutigen) "Rohzustand" abzogolten
        (Rohlmiete). Die Mielerin benetigt fur ihre Bedurinisse den Einbau von
        zusatzlichen lcchnischen Einrightungen (Energie, Luftung, ev,
        Laborinstallationen). Zum heutigen Zeitpunkt ist nodh offen, wie und
        wann die Raume ausgebaul werden (nur Labors, nur Buros oder gemischt
        Labors and Buros).

        Die Mieterin wird diese Ausbauinvestition des Vermieters durch einen
        zusatzlichen Mietzins abgelten (Ausbaurmioto). Hieruber wird zu
        gegebener Zeit in einem Nachtrag zu diesem Mietvertrag eine
        entsprechende Vereinbarung getroffen.

2.      MIETOBJEKT

2.1     Der Vermieter uberlasst dem Mieter in der vorne erwahnten Liegenschaft
        zur mietweisen Benutzung folgende Raume:

        -  Labor- and Buroraume im 4, Obergeschoss, ca. 754 m2 (inkl.
           WC-Anlagen, Liftvorplatz) zur Zeit im Rohzustand als Lager nutzbar.

2.2     Der Mieter ist berechtigt, im Haus Nr. 14 folgende dem gemeinsamen
        Gebrauch dienenden Gebaudeteile, Raume und Einrichtungen nach Massgabe
        der Hausordnung mitzubenutzen:

        -  Trappenhaus

        -  Personenlifte und Warenlift

2.3     Die Mietraume (ohne Unterteilung) gemass Ziff. 2.1 sind in dem
        beigelegten Grundrissplan dergestellt.
        Der Plan wird von beiden Parteien unterzeichnet und ist Bestandteil
        dieses Vertragos.

3.      MIETDAUER

3.11    Miotboginn

        Das Mietverhaltnis fur die rohen Raumlichkeiten beginnt am 01. Juli
        2000.

3.12    Mietdauer, Vertragsverlangerung

        Das Mietverhaltnis wird fur eine erste feste Vertragsdauer von 7 Jahren
        und 6 Monaten bis zum 31, Januar 2008 abgeschlossen.

        Nach Ablauf der ersten Vertragsdauer verlangert sich der Vertrag jeweils
        um eine weitere feste Vertragsdauer von 5 Jahren, wenn er nicht
        mindestens 12 Monate vor Ablauf mit eingeschriebenem Brief gekundigt
        wird.

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3.13    Kundigung

        Auf Ablauf einer festen Vertragsdauer kann das Mietverhaltnis mit einer
        Kundigungstrist von 12 Monaten jeweils auf Ende Januar, erstmals auf
        Ende Januar 2008, gekundigt werden.

3.2     Mietende

3.21    Die Kundigung gill als rechtzeitig erfolgt, wenn aie spatestons am
        letzten lago vor Boginn der Kundigungsfrist beim Emptanger bzw, in
        dessen Machtbereich (Abholnohz im Briefkasten oder Poetlach)
        eingetroffen ist.

        Der Vermieter hat fur die Kundigung das amtliche Formular zu verwenden.

3.22    Auf das Ende der festen Vertragsperiode bzw, der obengenannten
        Verlangerungsperiode kann der Mietzins mit einer Anzeigefrist von 15
        Monaten den marktublichen Konditionen angepassi werden.

3.3     Ausserterminliche Beendigung des Mietvertrages

3.31    Wunscht der Mieter das Mietverhaltnis ohne Einhaltung der vereinbarten
        Fristen bzw. Termine zu beenden, so hat er dies dem Vermieter mit
        eingeschriebonem Brief mitzuteilen.

3.32    Der Mieter hat das Recht, dem Vermieter einen zumulbaren zahlungsfahigen
        Ersalzmieter vorzuschlagen, der in das Vertragsverhaltnis eintritt.

3.33    Ohne gegentillige Vereinbarung trifft auch der Vermieter die notigen and
        lhm zumutbaren Vorkehrungen, die Mietraumlichkeiten baldmoglichst
        weitervarmieten zu konnen.

3.34    Der Mieter haftet fur den Mietzins und die Nebenkosten sowie fur seine
        obrigen Mieterptlicheten bis zur Weitervermietung der
        Mietraumilchkeiten, langsten bis zum nachsten vertraglichen
        Kundigungtermin und hat dafgur zusatzlich zu Ziff, 14.1 hiernach
        Sicherheilen zu leisten.

4.      MIETZINS

4.1     Der Mietzins wird wie tolgt vereinbart:

        Rohmiete (Rohbau) germass Ziffer 2.4 a) fur die rohen Raume (ohne
        mieterspezifischen Ausbau) gestaffcit:

        -  im 1. + 2. Mietjahr              Fr./m2/Jahr          75.00

        -  im 3. Mietjahr                   Fr./m2/Jahr          85.00

        -  im 4. Mietjahr                   Fr./m2/Jahr          100.00

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        -  ab 5. Mietjahr                   Fr./m(2)/Jahr          125.00

        Die Ausbaumioto fur den mieterspezifischen Ausbau wird wird nach
        vorliegen des Projektes in einem Nachtrag zu diesem Vertrag festgelegt.

4.2     Der jahrliche Mietzina betragt domzufolge boi Mietbeginn

<TABLE>
<S>                                         <C>           <C>                        <C>
        -  Rohmiete                         754 m(2) a      Fr./m(2)/Jahr 75.00       Fr.  56'550.00

        -  Total                                                                      Fr.  56'550.00

        zahlbar in viertetjahrlichen Raten von                                        Fr.  14'137.50
        zuzuglich: Nebenkosten vierteljahrlich (754 m(2) x 10.- Fr./m(2)/Jahr) Akonto Fr.   1'885.00
        Total vierteljahrlich zum voraus zahlbar                                      Fr.  16,022.50
</TABLE>

4.3     Der Mietzins ist im voraus, spatestens am ersten des Mietquartal (als
        Verfailtag) zahlbar.

5.      MIETZINSANPASSUNGEN

5.1     Dic Rohmiete fur Labors, basiert auf dem Landesindex der
        Konsumentenpreise, Sland August 1999 mit 105.1 Punkten. Wenn der
        Landesindex der Konsumentenpreise seit Mietbeginn bzw, seit der letzten
        Anpassung eine Veranderung erfahrl. so kann die Rohmiete ungeachtet der
        festen Veriragsdauer cinmal jahrlich per 1. April, erstmals im 5.
        Mietjahr, an die Veranderung dieses Indexes angepasst werden. Dabei darf
        jedoch die Rohmiete von Ziffer 4.1 nicht unterschmitten worden.

        Die Mietzinsanderung wird dem Mieter auf dem amtlichen Formular mil
        einer einmonatigen Anzeigefrist schriftlich mitgeteilt.

5.2     Erfolgen wahrend der festen Vertragsdauer wertvermehrende Aufwendungen
        resp. Investitionen, werden diese, den Usanzen entsprechend, der
        Basismiete gemass Ziff. 4 zugerechnet. Die Anzeigen der aufgrund von
        wertvermehrenden Aufwendungen vorgenommenen Mietzinsanpassungen erfolgen
        mit dem amtlichen Formular unler Einhaltung einer einmonatigen Frist.

6.      HEIZ- UND NEBENKOSTEN

6.1     Folgende Heiz- und Nebenkosten werden dem Mieter zusatzlich zum Mietzins
        belastel

        -  Hoizung und Warmwasser

        -  Botrieb und Unterhalt der Luftungsonloge

        -  Wasserverbrauch, Gebuhren und Abwasserreinigungslagen

        -  Betriebs- und Unterhaltskosten inkl. Serviceabonnement fur Personen-
           und Warenlift

        -  alig. Beleuchtung

        -  Hauswartdienst (Salar, Soziallelstungen, Hauswartmaterial)

        -  Kehrichtabfuhr/Kehrichtcontainer

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        -  allfailige Bewachungsauftrage oder Betrieb von Alarmanlagen

        -  3% der gesamten Nebenkosten als Verwaltungshonorar

6.2     Die Heiz- und Nebenkosten werden wie folgt verteilt (Leerstande gehen zu
        Lasten des Vermietors);

6.21    Kosten fur die Energieaufbereitung (insbesondere Heizungs- und
        Warmwasserkosten):

        -  Die Grund- und Warmwasserkosten werden nach der Grosse der
           Geschaftsraume (Quadratmeter) aufgeteilt.

        -  Die Heizkosten werden dsgegen nach den individuellen Messzahlern
           verlegt.

6.22    Neutrale Kosten (wie z.B. Hauswart, allg. Strom, Bewachungsauftrage,
        Alarmanlagen etc.) werden nach der Grosse der vermieteten Raumlichkeiten
        (Quadratmeter) aufgeteilt.

6.23    Verbrauchsabhangige Koslen (z.B. Wasserzins, Abwasser- und
        Kehrichtgebuhren, Liftbetriebskosten etc.) werden nach der Grosse der
        vermieteten Raumlichkeiten (Quadratmeter) verteilt.

6.3     Der Mieter leistet en die obengenannten Nebenkosten vierteljahrliche
        Akontozahlungen, wobol dor Vermieter jeweils per 30.6. eine
        Nebenkostenabrechnug erstellt und umgehend dem Mieter zustellt. Die
        Nebenkostenabrechnung gilt als anerkannt, wenn sie nicht innert 30 Tagen
        seit Zustellung (Poststempel) schriftlich beanstandet wird. Mit Ablauf
        der vorgenannlen 30-tagigen Beanstandungsfrist werden allfallige
        Nachforderungen bzw. Ruckzahlungen fallig.

        Wird das Mietverhaltnis wahrend der Rechnungsperiode beendet, hat der
        Mieter keinen Anspruch auf eino vorzeitigo Nebenkostenabrechnung.

6.4     Der gesamte Stromverbrauch fur das Mietobjekt geht zu Lasten des
        Mieters. Gebuhren und Abgaben, die ausschliesslich durch den
        Geschaftsbetrieb des Mieters verursacht werden, tragt der Mieter, auch
        wenn sie beim Vermieter erhoben werden.

7.      UEBERGABE DES MIOTOBJEKTES

7.1     Der Vermieter hat das Mielobjekt in sauberem, vertragsgemassen Zusland
        und nach Ortsublichker spatestens zu dem in Ziff. 3 genannten Datum
        unter Aushandigung der erforderlichen Schiussel zu ubergeben. Falit der
        vorgenannte Termin auf einen Samstag, Sonntag oder allgemeinen Feierlag,
        findet die Ubergabe spatostons am nachfolgenden Worktag staff.

7.2     Der Mieter hat dem Vermieter innert 30 Tagen nach Mictantritt allfallige
        lcstgestellte Mangel mit eingeschriebenem Brief zu melden. UnterlGAsst
        er dies, wird angenommen, dass ihm das Mielobjekt in vertragsgemGAssem
        Zustand ubergeben worden ist.

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8.      BENUTZUNG DES MIETOBJEKTES / SORGFALTSPFLICHT

8.1     Die Mietflache steht dem Mieter zur Benutzung als Buro/Labor zur
        Verfugung, bis zum Ausbau steht die Mietflacho dem Mieler zur Benutzung
        als Lager zur Verugung.

8.2     Der Mieter verpflichtel sich, das Mietobjekt zu keinem anderen als dem
        vertraglich vorgeschenen Zweck zu gebrauchen. Jede Anderung des
        Gebrauchazweckes bedarf der vorgangigen schriftlichen Zustimmung des
        Vermieters.

8.3     Bel Einbringung von Maschinen und schweren Mobeln ist den statischen
        Gegebenheiten des Gebaudes Rechnung zu tragen. Der Mieter hat sich
        vorgehend uber die zulassige Bodenbelastung zu vergewissern.

8.4     Fur die Benutzung des I ifts sind die von den Herstellern
        vorgeschriebenen Bedienungsanleitungen zu beachten.

8.5     Dor Mieter darf nur mit schriftlicher Zustimmung des Vermieters
        zusatzliche Sehlussel anfertigen lassen.

        Beim Verlust von Schlusseln hat der Mieter die Kosten fur deren Ersatz
        sowie fur die allrallige Ersetzung der Schliessanlagen zu tragen.

8.6     Bei der Benutzung der Mietsache verpflichtet sich der Mieter zur
        Sorgfalt und Rucksichtnahme, insbesondere auch gegenuber den Nachbarn.
        Die Hausordnung ist integrierender Bestandteil dieses Vertrages.

8.7     Der Mieter ist ganz allgemein verpflichtet, alle zumulbaren Massnahmen
        zur Vermeidung oder Verminderung vom Larm. Erschutlerungen, Geruch und
        sonstigen Immissionen zu treffen. Der Mieter haftet dem Vermieter fur
        den Schaden (inkl. Anspruche von Dritten), der diesem aus den die
        ubliehe und bewilligte Benutzung uberschreitenden Immissionen erwachst.

8.8     Fur die Verlelzung seiner Sorgfaltspflichten ist der Mieler voll
        ersatzpflichtig. Verletzt der Mieter lrotz schriftlicher Mahnung des
        Vermieters seine Pflicht zu Sorgfalt oder Rucksichinahme weiter, so kann
        der Vermieter don vorliegenden Mietvertrag uberdies gemass Art. 257 t OR
        auflosen.

9.      UNTERHALT

9.1     Unterhaltspflichten des Vermieters / Verbesserungen

9.11    Die Unterhaltsarbeiten des Mietobjektes obliegen dem Vermieter.

        9.12 Der Vermieter ist unter Rucksichtnahme auf die Interessen des
        Mieters jederzeit berechtigt, im Mietobjekt und an dazugehorenden
        Einrichtungen Reparaturen und Renovationen unbehindert auszufuhren,
        sofern das Mietverhaltnis nicht gekundigt ist.

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        Grossere Umbauten und Neuinstallationen werden dem Mieter schriftlich
        und fruhzeitig angezeigt. Allfallige Anspruche des Mieters richten sich
        nach Art. 260 OR.

9.2     Unterhaltspflichten des Mieters

9.21    Die durch den gewohnlichen Gebrauch notwendig Ausbesserungs und
        Reparaturarbeiten, welche im Finzelfall Fr. 500,- nicht ubersteigen,
        gehen zu Lasten des Mieters. Dazu zahten insbesondere das Ersetzen von
        elektrischen Sicherungen sowie zerbrochene Scheiben, die Instandhaltung
        der elektrischen Schalter und Steckdosen, der Gas- und Wasserhahnen,
        Abiaute sowie der Turschlosser, etc.

9.22    Fur den Unterhalt aller von ihm getatigten baulichen Veranderungen und
        Vorrichtungen kommt der Mieter auf.

9.23    Mangel, fur deren Behebung der Mieter nicht aufzukommen hat, sind dem
        Vermieter sofort anzuzeigen. Bei Nichtanzeige haftet der Mieter fur den
        daraus entstandenen Schaden.

10.     BAULICHE VERANDORUNGEN

10.1    Anderungen und Erneuerungen an und In den Mietraumen, das Anbringen von
        Storen. Firmenschildern oder Reklamovorrichtungen, etc. sind nur mit
        vorgangiger schriftlicher Zustimmung des Vermieters gestattet. Der
        Mieter ist zu einer fachgomassen Ausfuhrung verpflichtet. Die Anbringung
        von Vorrichtungen an der Fassade (Reklameschilder und Reklametafein,
        Storen, Schaukasten. Antennen, etc.), ist dem Mistebjekt und der
        Umgebung anzupassen.

10.2    Die Einrichtungen des Mieters bleiben dessen Eigentum. Die Plane und
        Entwurfe sowie die Kostenvoranschlage sind dem Vermieter zur
        schriftlichen Genehmigung vorzulegen.

10.3    Die Einholung allfalliger behordlicher Bewilligungen obliogt dom mieter.
        Der Mieter verpflichtet sich im weiteren, die ublichen Bauversicherungen
        abzuschliessen bzw. deren Kosten zu tragen und fur eine allfallige
        Mehrpramie der Gebaude- und Sachversicherung aufzukommen.

10.4    Der Vermieter ist berechtigt, vom Mieter eine Sicherstellung oder
        Finanzierungsnachweis der vom Mieter eingegangenen, voraussichtlichen
        baulichen Kosten zu verlangen, um insbesondere allfallige
        Bauhandwerkerpfandrechte rechtzeitig abwehren zu konnen.

        Wird der Vormieter fur Immissionen, die aufgrund baulicher Veranderungen
        oder Einrichtungen des Mieters enlslanden sind, von Drittpersonen in
        Anspruch genommen, ist der Mieter dem Vermieter fur den erlittenen
        Schaden ersatzpflichtig.

10.5    Der Mieter hat bei Mietbeendigung auf seine Kosten den ursprunglichen
        Zustand wiederherzustel len oder seine Einrichtungen gemass Ziffer 2.4c
        im gegenseitigen Einvernonmen dem Vermieter unentgelllich zu uberlassen.

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11.     UNTERMIETE / ABTRETUNG DES MIETVERTRAGES

        Toilwoise oder geinze Untermiete der Mietraumlichkeilen (oder die
        Abtrelung des Mietvertrages) bedurfen der schrifthehen Zustimmung des
        Vermieters.

12.     ZUTRITTSRECHT DES VERMIETERS

12.1    Der Vermieter oder dessen Vertreter ist berechtigt, das Mietobjekt zur
        Wahrung seiner Rechtc (Weitervermietung, Verkauf, Reparaturen,
        Erneuerungen, etc.) zu den ublichen Geschaftszeiten, nach 48-stundiger
        vorheriger Anmeldung, zu belreten.

12.2    Bei Abwesenheit des Mieters sind die Schlussel zur Vorfugung zu halten.

13.     VERSICHERUNGEN

13.1    Der Vermieter schliesst die obligatorische Brandversicherung, eine
        Hauseigentumerhaftpflichtversichorung sowie eine
        Gebaudewasserschadenversicherung ab.

13.2    Der Mieter tragt die Gefahr der Beschadigung oder des Verlustes seinor
        Einrichtungen, seines Mobiliars oder seiner Waren, wie insbesondero
        durch Feuer, Explosion, Wasser, Einbruch oder Diebstaht. Er verpflichtet
        sich eine Betriebshaftpflichtversicherung abzuschliessen.

13.3    Der Vermieter ubernimmt keine Haftung fur allfallige Schaufenster,
        Schaukasten, Scheiben. Glaswandverkleidungen. Firmenschilder,
        Leuchtschriften, etc. Es ist Sache des Mieters, sich gegen solche
        Schaden ausreichend zu versichern und uberdies eine
        Betriebshaftpflichtversicherung abzuschliesson.

14.     SICHERHEITSLEISTUNG

14.1    Der Mieter erbringt innert 14 Tagen nach Unterzeichnung des Vertrages
        fur die gesamte Mictdauer + 6 Monate eine Sicherheitsleistung in der
        Hohe von Fr. 30'000.00 in Form elner Bankgarantio oder, Mietzinsdepot.
        Nach Vorliegen des Ausbauprojekies wird die Sicherheitsleistung auf
        cinen halben Jahresmietzins der Ausbaumiete erhoht. Sollte der Vermieter
        gegen den Mieter Anspruche sus dem Mietverhaltnis geltend machen, hat
        die Bankgarantie bis zur Erledigung des Rechtsstreits gultig zu sein.
        Der Vermieter hat diesfals die Bank zu informieren.

14.2    Der Vermieter lst borechtigt, vom Mieter eine proportionale Anpassung
        der Sicherheitsleistung zu allfalligen Mietzinserhuhungen zu verlangen.

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15.     RUCKGABE DES MIETOBJEKTS

15.1    Der Mieter hat die Mietraume spatesiens am letzten Tage der Mietdauer,
        12.00 Uhr, mit allen Schlussein zu obergeben. Zusatzlich angefertigte
        Schlussel sind dem Vermieter entschadigungsios zu uberlassen. Fallt der
        Ruckgabetermin auf einen Samslag. Sonntag oder allgemeinen Foiertag, hat
        die Ruckgabe am nachsten Worktag (12.00 Uhr) zu erfolgen.

15.2    Bei Ruckgabe des Mietobjektes hat der Mieter die miotorseitigen
        Endausbaulen enlschadigungslos wieder zu entternen. Die vom Vermieter
        erstellton Zusalzausbauten (Ziff. 2.4b) bloiben im Mietobjeki. Falls
        mieterseitige Einbauten mit zustimmung des Vermietors im Mietobjeki
        verbleiben konnen, hat dei Vermieter hierfur keine Entschadigung zu
        bezahlen.

15.3    Die vom Mieter vorzunehmenden Instandstellungs- und Reinigungsarbeiten
        sind rechtzeitig zu beginnen, sodass sie auf Schluss des
        Mietverhallnisses beendigt sind.

        Kann das Mielobjekt aus Grunden, die der mieter zu vertrelen hat, nicht
        rechtzeitig dem Nachfoloer ubergeben werdon, haftet der Mieter dem
        Vermieter fur den daraus entstandenen Schaden.

15.4    Bel der Ruckgabe erstelli der Vermieter, vorzugswise in Anwesenheit des
        Mieters, ein Ruckgabeprotokoll, in weichem der Zustand der Mietsache
        sowie insbesondere Mangel und Schaden, fur welche der Mieter aufkommen
        soll, festgehalten werden. Das Protokoll ist durch den Mieter zu
        unterzeichnen oder ihm unverzuglich per eingeschriebenen Brief
        zuzustellen. Ist es dem Mieter nicht muglich, das Protokoll zu
        unterzeichnen, kann der Vermieter auf Kosten des Mieters such oin
        Protokoll durch einen amtlichen Experten erstellen lassen. Dieses ist
        wieder dom Mieter per oingeschriebenen Brief zur Kenntnis zu bringen.
        Erhebt der Mieter innert 30 Tagen seit Zusiellung des Protokolls keine
        Einsprache, so gilt es als von ihm anerkannt.

        Versteckte Mangel kann der Vermieter nachtraglich geltend machen. Er hat
        diese jedoch sotort nach deren Feststellung dem Mieter mit
        eingeschriebenem Brief mitzuteilen.

16.     SCHLUSSBESTIMMUNGEN

16.1    VERTRAGSANDERUNGEN

        Jegliche Vertragsanderung bedarf der schriftlichen Form.

16.2    ZUSTELLDOMIZIL

        Die nachfolgenden Adressen gelten bis zum widerruf durch
        eingeschriebenen Brief an die andere Partei als rechtsgultiges
        Zustelldrnizil der Vertragspartelen im Sinne dieses Vertrages:

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        Zustelldomizil des Mieters:         Gewerbestrasse 15, 4123 Allschwil

        Zustelldomizil des Vermieters:      Postfach, 4002 Basel

16.3    Gerichtsstand

        Fur alle Streiligkeiten aus diesem Mietvertrag gilt als Gerichtsstand
        der Ort der gemieteien Sache.

16.4    Grundbucheintragung

        Der Mieter hat das Recht. diesen Mietvertrag wahrend der Vertragsdauer
        auf eigene Kosten im Grundbruch eintragen zu lassen.

16.5    Stockwerkeigentum

        Fur den Fell, dass die Liegenschaft in Stockwerteigentum aufgeteilt
        wird. Ist der Vermieter bereit dem Mieter fur die Dauer des
        Mietverhaltnisses ein Vorkaufsrecht zu gewahrleisten.

Vorstehender mietvertrag wird in 3 Exemplaren ausgeferligt und unterzeichnet.

Basel, den 31, Januar 2000

Der Vermieter:                               Der Mieter:
Basler Kantonalbank                          Discovery Technologies AG

/s/ illegible                                /s/ illegible
-----------------------------------          -----------------------------------

                                             /s/ illegible
                                             -----------------------------------

17      Beilage:

           -   Grundrissplan mit eingetragenen Mietraume<PAGE>   1
                                                                    EXHIBIT 10.4

                               WEBSIDESTORY, INC.
                        2000 EMPLOYEE STOCK PURCHASE PLAN

        1.     ESTABLISHMENT, PURPOSE AND TERM OF PLAN.

               1.1 ESTABLISHMENT. The WebSideStory, Inc. 2000 Employee Stock
Purchase Plan (the "PLAN") is hereby established effective as of the effective
date of the initial registration by the Company of its Stock under Section 12 of
the Securities Exchange Act of 1934, as amended (the "EFFECTIVE DATE").

               1.2 PURPOSE. The purpose of the Plan is to advance the interests
of Company and its stockholders by providing an incentive to attract and retain
Eligible Employees of the Participating Company Group and by motivating such
persons to contribute to the growth and profitability of the Participating
Company Group. The Plan provides such Eligible Employees with an opportunity to
acquire a proprietary interest in the Company through the purchase of Stock. The
Company intends that the Plan qualify as an "employee stock purchase plan" under
Section 423 of the Code (including any amendments or replacements of such
section), and the Plan shall be so construed.

               1.3 TERM OF PLAN. The Plan shall continue in effect until the
earlier of its termination by the Board or the date on which all of the shares
of Stock available for issuance under the Plan have been issued.

        2.     DEFINITIONS AND CONSTRUCTION.

               2.1 DEFINITIONS. Any term not expressly defined in the Plan but
defined for purposes of Section 423 of the Code shall have the same definition
herein. Whenever used herein, the following terms shall have their respective
meanings set forth below:

                      (a) "BOARD" means the Board of Directors of the Company.
If one or more Committees have been appointed by the Board to administer the
Plan, "Board" also means such Committee(s).

                      (b) "CODE" means the Internal Revenue Code of 1986, as
amended, and any applicable regulations promulgated thereunder.

                      (c) "COMMITTEE" means a committee of the Board duly
appointed to administer the Plan and having such powers as specified by the
Board. Unless the powers of the Committee have been specifically limited, the
Committee shall have all of the powers of the Board granted herein, including,
without limitation, the power to amend or terminate the Plan at any time,
subject to the terms of the Plan and any applicable limitations imposed by law.

                                       1
<PAGE>   2

                      (d) "COMPANY" means WebSideStory, Inc., a Delaware
corporation, or any successor corporation thereto.

                      (e) "COMPENSATION" means, with respect to any Offering
Period, base wages or salary, overtime pay, bonuses, commissions, shift
differentials, payments for paid time off, payments in lieu of notice, and any
of such compensation deferred under any program or plan established by a
Participating Company, including, without limitation, pursuant to Section 401(k)
or Section 125 of the Code. Compensation shall be limited to amounts actually
payable in cash directly to the Participant or deferred by the Participant
during the Offering Period. However, notwithstanding the foregoing, Compensation
shall not include sign-on bonuses, payments pursuant to a severance agreement,
termination pay, reimbursements of expenses, allowances, disability pay,
workers' compensation or any amount deemed received without the actual transfer
of cash or any amounts directly or indirectly paid pursuant to the Plan or any
other stock purchase or stock option plan, or any other compensation not
included above.

                      (f) "ELIGIBLE EMPLOYEE" means an Employee who meets the
requirements set forth in Section 5 for eligibility to participate in the Plan.

                      (g) "EMPLOYEE" means a person treated as an employee of a
Participating Company for purposes of Section 423 of the Code. A Participant
shall be deemed to have ceased to be an Employee either upon an actual
termination of employment or upon the corporation employing the Participant
ceasing to be a Participating Company. For purposes of the Plan, an individual
shall not be deemed to have ceased to be an Employee while on any military
leave, sick leave, or other bona fide leave of absence approved by the Company
of ninety (90) days or less. If an individual's leave of absence exceeds ninety
(90) days, the individual shall be deemed to have ceased to be an Employee on
the ninety-first (91st) day of such leave unless the individual's right to
reemployment with the Participating Company Group is guaranteed either by
statute or by contract. The Company shall determine in good faith and in the
exercise of its discretion whether an individual has become or has ceased to be
an Employee and the effective date of such individual's employment or
termination of employment, as the case may be. For purposes of an individual's
participation in or other rights, if any, under the Plan as of the time of the
Company's determination, all such determinations by the Company shall be final,
binding and conclusive, notwithstanding that the Company or any governmental
agency subsequently makes a contrary determination.

                      (h) "ENTRY DATE" means (i) the Offering Date of an
Offering Period, or (ii) with respect to persons who first become Eligible
Employees after the commencement of the Initial Offering Period (as defined in
Section 6.1 below) but prior to the commencement of the final Purchase Period of
the Initial Offering Period, or did not previously elect to participate in the
Initial Offering Period, the first day of the Purchase Period following the date
on which such person becomes an Eligible Employee, or elects to enroll in the
Initial Offering Period, respectively. Notwithstanding the foregoing, in the
event that the Fair Market Value of a share of Stock on the first, second or
third Purchase Date of the Initial Offering Period is less than the Fair Market
Value of a share of Stock on the Entry Date for a Participant who was
participating in the Offering as of such Purchase Date, the Entry Date for such
Participant for the remainder of

                                       2
<PAGE>   3

the Offering shall be the first day of the next Purchase Period immediately
following such Purchase Date.

                      (i) "FAIR MARKET VALUE" means, as of any date:

                             (i) If the Stock is then listed on a national or
regional securities exchange or market system or is regularly quoted by a
recognized securities dealer, the closing sale price of a share of Stock (or the
mean of the closing bid and asked prices if the Stock is so quoted instead) as
quoted on the Nasdaq National Market, the Nasdaq SmallCap Market or such other
national or regional securities exchange or market system constituting the
primary market for the Stock, or by such recognized securities dealer, as
reported in The Wall Street Journal or such other source as the Company deems
reliable. If the relevant date does not fall on a day on which the Stock has
traded on such securities exchange or market system or has been quoted by such
securities dealer, the date on which the Fair Market Value is established shall
be the last day on which the Stock was so traded or quoted prior to the relevant
date, or such other appropriate day as determined by the Board, in its
discretion.

                             (ii) If, on the relevant date, the Stock is not
then listed on a national or regional securities exchange or market system or
regularly quoted by a recognized securities dealer, the Fair Market Value of a
share of Stock shall be as determined in good faith by the Board.

                             (iii) Notwithstanding the foregoing, the Fair
Market Value of a share of Stock on the Effective Date shall be deemed to be the
public offering price set forth in the final prospectus filed with the
Securities and Exchange Commission in connection with the Company's initial
public offering of the Stock.

                      (j) "OFFERING" means an offering of Stock as provided in
Section 6.

                      (k) "OFFERING DATE" means, for any Offering, the first day
of the Offering Period.

                      (l) "OFFERING PERIOD" means a period established in
accordance with Section 6.1.

                      (m) "PARENT CORPORATION" means any present or future
"parent corporation" of the Company, as defined in Section 424(e) of the Code.

                      (n) "PARTICIPANT" means an Eligible Employee who has
become a participant in an Offering Period in accordance with Section 7 and
remains a participant in accordance with the Plan.

                      (o) "PARTICIPATING COMPANY" means the Company or any
Parent Corporation or Subsidiary Corporation designated by the Board as a
corporation the Employees of which may, if Eligible Employees, participate in
the Plan. The Board shall have the sole and

                                       3
<PAGE>   4

absolute discretion to determine from time to time which Parent Corporations or
Subsidiary Corporations shall be Participating Companies.

                      (p) "PARTICIPATING COMPANY GROUP" means, at any point in
time, the Company and all other corporations collectively which are then
Participating Companies.

                      (q) "PURCHASE DATE" means, for any Purchase Period, the
last day of such period.

                      (r) "PURCHASE PERIOD" means a period established in
accordance with Section 6.2.

                      (s) "PURCHASE PRICE" means the price at which a share of
Stock may be purchased under the Plan, as determined in accordance with Section
9.

                      (t) "PURCHASE RIGHT" means an option granted to a
Participant pursuant to the Plan to purchase such shares of Stock as provided in
Section 8, which the Participant may or may not exercise during the Offering
Period in which such option is outstanding. Such option arises from the right of
a Participant to withdraw any accumulated payroll deductions of the Participant
not previously applied to the purchase of Stock under the Plan and to terminate
participation in the Plan at any time during an Offering Period.

                      (u) "STOCK" means the common stock of the Company, as
adjusted from time to time in accordance with Section 4.2.

                      (v) "SUBSCRIPTION AGREEMENT" means a written agreement in
such form as specified by the Company, stating an Employee's election to
participate in the Plan and authorizing payroll deductions under the Plan from
the Employee's Compensation.

                      (w) "SUBSCRIPTION DATE" means the last business day prior
to an Entry Date or such other date as the Company shall establish.

                      (x) "SUBSIDIARY CORPORATION" means any present or future
"subsidiary corporation" of the Company, as defined in Section 424(f) of the
Code.

               2.2 CONSTRUCTION. Captions and titles contained herein are for
convenience only and shall not affect the meaning or interpretation of any
provision of the Plan. Except when otherwise indicated by the context, the
singular shall include the plural and the plural shall include the singular. Use
of the term "or" is not intended to be exclusive, unless the context clearly
requires otherwise.

        3.     ADMINISTRATION.

               3.1 ADMINISTRATION BY THE BOARD. The Plan shall be administered
by the Board. All questions of interpretation of the Plan, of any form of
agreement or other document employed by the Company in the administration of the
Plan, or of any Purchase Right shall be

                                       4
<PAGE>   5

determined by the Board and shall be final and binding upon all persons having
an interest in the Plan or the Purchase Right. Subject to the provisions of the
Plan, the Board shall determine all of the relevant terms and conditions of
Purchase Rights; provided, however, that all Participants granted Purchase
Rights pursuant to an Offering shall have the same rights and privileges within
the meaning of Section 423(b)(5) of the Code. All expenses incurred in
connection with the administration of the Plan shall be paid by the Company.

               3.2 AUTHORITY OF OFFICERS. Any officer of the Company shall have
the authority to act on behalf of the Company with respect to any matter, right,
obligation, determination or election that is the responsibility of or that is
allocated to the Company herein, provided that the officer has apparent
authority with respect to such matter, right, obligation, determination or
election.

               3.3 POLICIES AND PROCEDURES ESTABLISHED BY THE COMPANY. The
Company may, from time to time, consistent with the Plan and the requirements of
Section 423 of the Code, establish, change or terminate such rules, guidelines,
policies, procedures, limitations, or adjustments as deemed advisable by the
Company, in its discretion, for the proper administration of the Plan,
including, without limitation, (a) a minimum payroll deduction amount required
for participation in an Offering, (b) a limitation on the frequency or number of
changes permitted in the rate of payroll deduction during an Offering, (c) an
exchange ratio applicable to amounts withheld in a currency other than United
States dollars, (d) a payroll deduction greater than or less than the amount
designated by a Participant in order to adjust for the Company's delay or
mistake in processing a Subscription Agreement or in otherwise effecting a
Participant's election under the Plan or as advisable to comply with the
requirements of Section 423 of the Code, and (e) determination of the date and
manner by which the Fair Market Value of a share of Stock is determined for
purposes of administration of the Plan.

               3.4 INDEMNIFICATION. In addition to such other rights of
indemnification as they may have as members of the Board or officers or
employees of the Participating Company Group, members of the Board and any
officers or employees of the Participating Company Group to whom authority to
act for the Board or the Company is delegated shall be indemnified by the
Company against all reasonable expenses, including attorneys' fees, actually and
necessarily incurred in connection with the defense of any action, suit or
proceeding, or in connection with any appeal therein, to which they or any of
them may be a party by reason of any action taken or failure to act under or in
connection with the Plan, or any right granted hereunder, and against all
amounts paid by them in settlement thereof (provided such settlement is approved
by independent legal counsel selected by the Company) or paid by them in
satisfaction of a judgment in any such action, suit or proceeding, except in
relation to matters as to which it shall be adjudged in such action, suit or
proceeding that such person is liable for gross negligence, bad faith or
intentional misconduct in duties; provided, however, that within sixty (60) days
after the institution of such action, suit or proceeding, such person shall
offer to the Company, in writing, the opportunity at its own expense to handle
and defend the same.

                                       5
<PAGE>   6

        4.     SHARES SUBJECT TO PLAN.

               4.1 MAXIMUM NUMBER OF SHARES ISSUABLE. Subject to adjustment as
provided in Section 4.2, the maximum aggregate number of shares of Stock that
may be issued under the Plan shall be 500,000, cumulatively increased on January
1, 2001 and each January 1 thereafter until and including January 1, 2010 (the
"ANNUAL INCREASE") by the lesser of (a) 2% of the shares of issued and
outstanding Stock on the immediately preceding December 31, (b) ____________
shares, or (c) such lesser number of shares determined by the Board, and shall
consist of authorized but unissued or reacquired shares of Stock, or any
combination thereof. If an outstanding Purchase Right for any reason expires or
is terminated or canceled, the shares of Stock allocable to the unexercised
portion of that Purchase Right shall again be available for issuance under the
Plan.

               4.2 ADJUSTMENTS FOR CHANGES IN CAPITAL STRUCTURE. In the event of
any stock dividend, stock split, reverse stock split, recapitalization,
combination, reclassification or similar change in the capital structure of the
Company, or in the event of any merger (including a merger effected for the
purpose of changing the Company's domicile), sale of assets or other
reorganization in which the Company is a party, appropriate adjustments shall be
made in the number and class of shares subject to the Plan, the Annual Increase,
the limit on the shares which may be purchased by any Participant on a Purchase
Date (as described in Section 8.1) and each Purchase Right, and in the Purchase
Price. If a majority of the shares of the same class as the shares subject to
outstanding Purchase Rights are exchanged for, converted into, or otherwise
become (whether or not pursuant to an Ownership Change Event) shares of another
corporation (the "NEW SHARES"), the Board may unilaterally amend the outstanding
Purchase Rights to provide that such Purchase Rights are exercisable for New
Shares. In the event of any such amendment, the number of shares subject to, and
the Purchase Price of, the outstanding Purchase Rights shall be adjusted in a
fair and equitable manner, as determined by the Board, in its discretion.
Notwithstanding the foregoing, any fractional share resulting from an adjustment
pursuant to this Section 4.2 shall be rounded down to the nearest whole number,
and in no event may the Purchase Price be decreased to an amount less than the
par value, if any, of the stock subject to the Purchase Right. The adjustments
determined by the Board pursuant to this Section 4.2 shall be final, binding and
conclusive.

        5.     ELIGIBILITY.

               5.1 EMPLOYEES ELIGIBLE TO PARTICIPATE. Each Employee of a
Participating Company is eligible to participate in the Plan and shall be deemed
an Eligible Employee, except any Employee who is either: (a) customarily
employed by the Participating Company Group for twenty (20) hours or less per
week or (b) customarily employed by the Participating Company Group for not more
than five (5) months in any calendar year.

               5.2 EXCLUSION OF CERTAIN STOCKHOLDERS. Notwithstanding any
provision of the Plan to the contrary, no Employee shall be granted a Purchase
Right under the Plan if, immediately after such grant, the Employee would own or
hold options to purchase stock of the Company or of any Parent Corporation or
Subsidiary Corporation possessing five percent (5%) or more of the total
combined voting power or value of all classes of stock of such corporation,

                                       6
<PAGE>   7

as determined in accordance with Section 423(b)(3) of the Code. For purposes of
this Section 5.2, the attribution rules of Section 424(d) of the Code shall
apply in determining the stock ownership of such Employee.

        6.     OFFERINGS.

               6.1    OFFERING PERIODS.

                      (a) INITIAL OFFERING PERIOD. The Plan shall be implemented
by sequential Offerings (an "OFFERING PERIOD"). The first Offering Period shall
commence on the Effective Date and end on the last day of April, 2002 (the
"INITIAL OFFERING PERIOD").

                      (b) SUBSEQUENT OFFERING PERIODS. After the completion of
the Initial Offering Period, subsequent Offerings shall commence on the first
day of May and November of each year and end on the last day of October and
April, respectively, occurring thereafter, and will have a duration of
approximately six (6) months.

               6.2 PURCHASE PERIODS. The Initial Offering Period shall consist
of four (4) consecutive Purchase Periods of approximately six (6) months
duration. Purchase Periods shall commence on the Effective Date, November 1,
2000, May 1, 2001 and November 1, 2001. Purchase Periods beginning on the first
day of May and November shall end on the last day of October and April,
respectively, occurring thereafter. The Purchase Period commencing on the
Effective Date shall end on October 31, 2000.

               6.3 DISCRETION TO VARY DURATION. Notwithstanding the foregoing,
the Board may establish a different duration for one or more Offering Periods or
Purchase Periods or different commencing or ending dates for such periods;
provided, however, that no Offering Period may have a duration exceeding
twenty-seven (27) months. If the first or last day of an Offering Period or a
Purchase Period is not a day on which the national securities exchanges or
Nasdaq Stock Market are open for trading, the Company shall specify the trading
day that will be deemed the first or last day, as the case may be, of the
period.

        7.     PARTICIPATION IN THE PLAN.

               7.1 INITIAL PARTICIPATION. An Eligible Employee may become a
Participant in an Offering Period by delivering a properly completed
Subscription Agreement to the office designated by the Company not later than
the close of business for such office on the Subscription Date established by
the Company for the applicable Entry Date. An Eligible Employee who does not
deliver a properly completed Subscription Agreement to the Company's designated
office on or before the Subscription Date for an Entry Date shall not
participate in the Plan for that Offering Period or for any subsequent Offering
Period unless the Eligible Employee subsequently delivers a properly completed
Subscription Agreement to the appropriate office of the Company on or before the
Subscription Date for a subsequent Entry Date. An Employee who becomes an
Eligible Employee after the Offering Date of an Offering Period (other than the
Initial Offering Period) shall not be eligible to participate in that Offering
Period but may

                                       7
<PAGE>   8

participate in any subsequent Offering Period provided the Employee is still an
Eligible Employee as of the Offering Date of such subsequent Offering Period.

               7.2 CONTINUED PARTICIPATION. A Participant shall automatically
participate in the next Offering Period commencing immediately after the final
Purchase Date of each Offering Period in which the Participant participates
provided that the Participant remains an Eligible Employee on the Offering Date
of the new Offering Period and has not either (a) withdrawn from the Plan
pursuant to Section 12.1 or (b) terminated employment as provided in Section 13.
A Participant who may automatically participate in a subsequent Offering Period,
as provided in this Section, is not required to deliver any additional
Subscription Agreement for the subsequent Offering Period in order to continue
participation in the Plan. However, a Participant may deliver a new Subscription
Agreement for a subsequent Offering Period in accordance with the procedures set
forth in Section 7.1 if the Participant desires to change any of the elections
contained in the Participant's then effective Subscription Agreement.

        8.     RIGHT TO PURCHASE SHARES.

               8.1 GRANT OF PURCHASE RIGHT. Except as set forth below (or
otherwise specified by the Board prior to the Offering Date), on the Offering
Date of each Offering Period, each Participant in such Offering Period shall be
granted automatically, on his or her Entry Date, a Purchase Right consisting of
an option to purchase, on each Purchase Date within such Offering Period, that
number of whole shares of Stock determined by dividing the aggregate payroll
deductions collected from the Participant by the applicable Purchase Price on
such Purchase Date; provided, however, that no Participant may purchase more
than 2,500 shares of Stock on any Purchase Date.

               8.2 CALENDAR YEAR PURCHASE LIMITATION. Notwithstanding any
provision of the Plan to the contrary, no Participant shall be granted a
Purchase Right which permits his or her right to purchase shares of Stock under
the Plan to accrue at a rate which, when aggregated with such Participant's
rights to purchase shares under all other employee stock purchase plans of a
Participating Company intended to meet the requirements of Section 423 of the
Code, exceeds Twenty-Five Thousand Dollars ($25,000) in Fair Market Value (or
such other limit, if any, as may be imposed by the Code) for each calendar year
in which such Purchase Right is outstanding at any time. For purposes of the
preceding sentence, the Fair Market Value of shares purchased during a given
Offering Period shall be determined as of the Offering Date for such Offering
Period. The limitation described in this Section shall be applied in conformance
with applicable regulations under Section 423(b)(8) of the Code.

        9.     PURCHASE PRICE.

               The Purchase Price at which each share of Stock may be acquired
in an Offering Period upon the exercise of all or any portion of a Purchase
Right shall be established by the Board; provided, however, that the Purchase
Price on each Purchase Date shall not be less than eighty-five percent (85%) of
the lesser of (a) the Fair Market Value of a share of Stock on the Participant's
Entry Date of the Offering Period or (b) the Fair Market Value of a share of
Stock on the Purchase Date. Unless otherwise provided by the Board prior to the
commencement of an

                                       8
<PAGE>   9

Offering Period, the Purchase Price on each Purchase Date during that Offering
Period shall be eighty-five percent (85%) of the lesser of (a) the Fair Market
Value of a share of Stock on the Participant's Entry Date of the Offering
Period, or (b) the Fair Market Value of a share of Stock on the Purchase Date.

        10.    ACCUMULATION OF PURCHASE PRICE THROUGH PAYROLL DEDUCTION.

               Shares of Stock acquired pursuant to the exercise of all or any
portion of a Purchase Right may be paid for only by means of payroll deductions
from the Participant's Compensation accumulated during the Offering Period for
which such Purchase Right was granted, subject to the following:

               10.1 AMOUNT OF PAYROLL DEDUCTIONS. Except as otherwise provided
herein, the amount to be deducted under the Plan from a Participant's
Compensation on each payday during an Offering Period shall be determined by the
Participant's Subscription Agreement. The Subscription Agreement shall set forth
the percentage of the Participant's Compensation to be deducted on each payday
during an Offering Period in whole percentages of not less than one percent (1%)
(except as a result of an election pursuant to Section 10.3 to stop payroll
deductions) or more than ten percent (10%). The Board may change the foregoing
limits on payroll deductions effective as of any Offering Date.

               10.2 COMMENCEMENT OF PAYROLL DEDUCTIONS. Payroll deductions shall
commence on the first payday following the Offering Date and shall continue to
the end of the Offering Period unless sooner altered or terminated as provided
herein.

               10.3 ELECTION TO CHANGE OR STOP PAYROLL DEDUCTIONS. During an
Offering Period, a Participant may elect to increase or decrease the rate of or
to stop deductions from his or her Compensation by delivering to the Company's
designated office an amended Subscription Agreement authorizing such change on
or before the Change Notice Date, as defined below. A Participant may elect,
after the first payday of an Offering Period, to decrease the rate of his or her
payroll deductions to zero percent (0%), and shall nevertheless remain a
Participant in the current Offering Period unless such Participant withdraws
from the Plan as provided in Section 12.1. The "CHANGE NOTICE DATE" shall be the
day immediately prior to the beginning of the first pay period for which such
election is to be effective, unless a different date is established by the
Company and announced to the Participants.

               10.4 ADMINISTRATIVE SUSPENSION OF PAYROLL DEDUCTIONS. The Company
may, in its sole discretion, suspend a Participant's payroll deductions under
the Plan as the Company deems advisable to avoid accumulating payroll deductions
in excess of the amount that could reasonably be anticipated to purchase the
maximum number of shares of Stock permitted (a) under the Participant's Purchase
Right or (b) during a calendar year under the limit set forth in Section 8.2.
Payroll deductions shall be resumed at the rate specified in the Participant's
then effective Subscription Agreement at the beginning, respectively, of (a) the
next Offering Period, provided that the individual is a Participant in such
Offering Period or (b) the next Purchase Period the Purchase Date of which falls
in the following calendar year, unless the Participant has

                                       9
<PAGE>   10

either withdrawn from the Plan as provided in Section 12.1 or has ceased to be
an Eligible Employee.

               10.5 PARTICIPANT ACCOUNTS. Individual bookkeeping accounts shall
be maintained for each Participant. All payroll deductions from a Participant's
Compensation shall be credited to such Participant's Plan account and shall be
deposited with the general funds of the Company. All payroll deductions received
or held by the Company may be used by the Company for any corporate purpose.

               10.6 NO INTEREST PAID. Interest shall not be paid on sums
deducted from a Participant's Compensation pursuant to the Plan.

               10.7 VOLUNTARY WITHDRAWAL FROM PLAN ACCOUNT. A Participant may
withdraw all or any portion of the payroll deductions credited to his or her
Plan account and not previously applied toward the purchase of Stock by
delivering to the Company's designated office a written notice on a form
provided by the Company for such purpose. A Participant who withdraws the entire
remaining balance credited to his or her Plan account shall be deemed to have
withdrawn from the Plan in accordance with Section 12.1. Amounts withdrawn shall
be returned to the Participant as soon as practicable after the Company's
receipt of the notice of withdrawal and may not be applied to the purchase of
shares in any Offering under the Plan. The Company may from time to time
establish or change limitations on the frequency of withdrawals permitted under
this Section, establish a minimum dollar amount that must be retained in the
Participant's Plan account, or terminate the withdrawal right provided by this
Section.

        11.    PURCHASE OF SHARES.

               11.1 EXERCISE OF PURCHASE RIGHT. On each Purchase Date, each
Participant who has not withdrawn from the Plan and whose participation in the
Offering has not otherwise terminated before such Purchase Date shall
automatically acquire pursuant to the exercise of the Participant's Purchase
Right the number of whole shares of Stock determined by dividing (a) the total
amount of the Participant's payroll deductions accumulated in the Participant's
Plan account during the Offering Period and not previously applied toward the
purchase of Stock by (b) the Purchase Price. However, in no event shall the
number of shares purchased by the Participant during an Offering Period exceed
the number of shares subject to the Participant's Purchase Right. No shares of
Stock shall be purchased on a Purchase Date on behalf of a Participant whose
participation in the Offering or the Plan has terminated before such Purchase
Date.

               11.2 PRO RATA ALLOCATION OF SHARES. If the number of shares of
Stock which might be purchased by all Participants in the Plan on a Purchase
Date exceeds the number of shares of Stock available in the Plan as provided in
Section 4.1, the Company shall make a pro rata allocation of the remaining
shares in as uniform a manner as practicable and as the Company determines to be
equitable. Any fractional share resulting from such pro rata allocation to any
Participant shall be disregarded.

                                       10
<PAGE>   11

               11.3 DELIVERY OF CERTIFICATES. As soon as practicable after each
Purchase Date, the Company shall arrange the delivery to each Participant of a
certificate representing the shares acquired by the Participant on such Purchase
Date; provided that the Company may deliver such shares to a broker designated
by the Company that will hold such shares for the benefit of the Participant.
Shares to be delivered to a Participant under the Plan shall be registered in
the name of the Participant, or, if requested by the Participant, in the name of
the Participant and his or her spouse, or, if applicable, in the names of the
heirs of the Participant.

               11.4 RETURN OF CASH BALANCE. Any cash balance remaining in a
Participant's Plan account following any Purchase Date shall be refunded to the
Participant as soon as practicable after such Purchase Date. However, if the
cash balance to be returned to a Participant pursuant to the preceding sentence
is less than the amount that would have been necessary to purchase an additional
whole share of Stock on such Purchase Date, the Company may retain the cash
balance in the Participant's Plan account to be applied toward the purchase of
shares of Stock in the subsequent Purchase Period or Offering Period, as the
case may be.

               11.5 TAX WITHHOLDING. At the time a Participant's Purchase Right
is exercised, in whole or in part, or at the time a Participant disposes of some
or all of the shares of Stock he or she acquires under the Plan, the Participant
shall make adequate provision for the federal, state, local and foreign tax
withholding obligations, if any, of the Participating Company Group which arise
upon exercise of the Purchase Right or upon such disposition of shares,
respectively. The Participating Company Group may, but shall not be obligated
to, withhold from the Participant's compensation the amount necessary to meet
such withholding obligations.

               11.6 EXPIRATION OF PURCHASE RIGHT. Any portion of a Participant's
Purchase Right remaining unexercised after the end of the Offering Period to
which the Purchase Right relates shall expire immediately upon the end of the
Offering Period.

               11.7 PROVISION OF REPORTS AND STOCKHOLDER INFORMATION TO
PARTICIPANTS. Each Participant who has exercised all or part of his or her
Purchase Right shall receive, as soon as practicable after the Purchase Date, a
report of such Participant's Plan account setting forth the total payroll
deductions accumulated prior to such exercise, the number of shares of Stock
purchased, the Purchase Price for such shares, the date of purchase and the cash
balance, if any, remaining immediately after such purchase that is to be
refunded or retained in the Participant's Plan account pursuant to Section 11.4.
The report required by this Section may be delivered in such form and by such
means, including by electronic transmission, as the Company may determine. In
addition, each Participant shall be provided information concerning the Company
equivalent to that information provided generally to the Company's common
stockholders.

        12.    WITHDRAWAL FROM OFFERING OR PLAN.

               12.1 VOLUNTARY WITHDRAWAL. A Participant may withdraw from the
Plan by signing and delivering to the Company's designated office a written
notice of withdrawal on a form provided by the Company for this purpose. Such
withdrawal may be elected at any time prior to the end of an Offering Period;
provided, however, that if a Participant withdraws from the Plan after a
Purchase Date, the withdrawal shall not affect shares of Stock acquired by the

                                       11
<PAGE>   12

Participant on such Purchase Date. A Participant who voluntarily withdraws from
the Plan or an Offering is prohibited from resuming participation in the Plan in
the same Offering from which he or she withdrew, but may participate in any
subsequent Offering by again satisfying the requirements of Sections 5 and 7.1.
The Company may impose, from time to time, a requirement that the notice of
withdrawal be on file with the Company's designated office for a reasonable
period prior to the effectiveness of the Participant's withdrawal.

               12.2 RETURN OF PAYROLL DEDUCTIONS. Upon a Participant's voluntary
withdrawal from the Plan pursuant to Sections 12.1, the Participant's
accumulated payroll deductions which have not been applied toward the purchase
of shares of Stock shall be refunded to the Participant as soon as practicable
after the withdrawal, without the payment of any interest, and the Participant's
interest in the Plan or the Offering, as applicable, shall terminate. Such
accumulated payroll deductions to be refunded in accordance with this Section
may not be applied to any other Offering under the Plan.

        13.    TERMINATION OF EMPLOYMENT OR ELIGIBILITY.

               Upon a Participant's ceasing, prior to a Purchase Date, to be an
Employee of the Participating Company Group for any reason, including
retirement, disability or death, or upon the failure of a Participant to remain
an Eligible Employee, the Participant's participation in the Plan shall
terminate immediately. In such event, the Participant's accumulated payroll
deductions which have not been applied toward the purchase of shares shall, as
soon as practicable, be returned to the Participant or, in the case of the
Participant's death, to the Participant's beneficiary designated in accordance
with Section 20, if any, or legal representative, and all of the Participant's
rights under the Plan shall terminate. Interest shall not be paid on sums
returned pursuant to this Section 13. A Participant whose participation has been
so terminated may again become eligible to participate in the Plan by satisfying
the requirements of Sections 5 and 7.1.

        14.    CHANGE IN CONTROL.

               14.1   DEFINITIONS.

                      (a) An "OWNERSHIP CHANGE EVENT" shall be deemed to have
occurred if any of the following occurs with respect to the Company: (i) the
direct or indirect sale or exchange in a single or series of related
transactions by the stockholders of the Company of more than fifty percent (50%)
of the voting stock of the Company; (ii) a merger or consolidation in which the
Company is a party; (iii) the sale, exchange, or transfer of all or
substantially all of the assets of the Company; or (iv) a liquidation or
dissolution of the Company.

                      (b) A "CHANGE IN CONTROL" shall mean an Ownership Change
Event or a series of related Ownership Change Events (collectively, the
"TRANSACTION") wherein the stockholders of the Company immediately before the
Transaction do not retain immediately after the Transaction, in substantially
the same proportions as their ownership of shares of the Company's voting stock
immediately before the Transaction, direct or indirect beneficial ownership of
more than fifty percent (50%) of the total combined voting power of the

                                       12
<PAGE>   13

outstanding voting stock of the Company or the corporation or corporations to
which the assets of the Company were transferred (the "TRANSFEREE
CORPORATION(s)"), as the case may be. For purposes of the preceding sentence,
indirect beneficial ownership shall include, without limitation, an interest
resulting from ownership of the voting stock of one or more corporations which,
as a result of the Transaction, own the Company or the Transferee
Corporation(s), as the case may be, either directly or through one or more
subsidiary corporations. The Board shall have the right to determine whether
multiple sales or exchanges of the voting stock of the Company or multiple
Ownership Change Events are related, and its determination shall be final,
binding and conclusive.

               14.2 EFFECT OF CHANGE IN CONTROL ON PURCHASE RIGHTS. In the event
of a Change in Control, the surviving, continuing, successor, or purchasing
corporation or parent corporation thereof, as the case may be (the "ACQUIRING
CORPORATION"), may assume the Company's rights and obligations under the Plan.
If the Acquiring Corporation elects not to assume the Company's rights and
obligations under outstanding Purchase Rights, the Purchase Date of the then
current Purchase Period shall be accelerated to a date before the date of the
Change in Control specified by the Board, but the number of shares of Stock
subject to outstanding Purchase Rights shall not be adjusted. All Purchase
Rights which are neither assumed by the Acquiring Corporation in connection with
the Change in Control nor exercised as of the date of the Change in Control
shall terminate and cease to be outstanding effective as of the date of the
Change in Control.

        15.    NONTRANSFERABILITY OF PURCHASE RIGHTS.

               Neither payroll deductions credited to a Participant's Plan
account nor a Participant's Purchase Right may be assigned, transferred, pledged
or otherwise disposed of in any manner other than as provided by the Plan or by
will or the laws of descent and distribution. (A beneficiary designation
pursuant to Section 20 shall not be treated as a disposition for this purpose.)
Any such attempted assignment, transfer, pledge or other disposition shall be
without effect, except that the Company may treat such act as an election to
withdraw from the Plan as provided in Section 12.1. A Purchase Right shall be
exercisable during the lifetime of the Participant only by the Participant.

        16.    COMPLIANCE WITH SECURITIES LAW.

               The issuance of shares under the Plan shall be subject to
compliance with all applicable requirements of federal, state and foreign law
with respect to such securities. A Purchase Right may not be exercised if the
issuance of shares upon such exercise would constitute a violation of any
applicable federal, state or foreign securities laws or other law or regulations
or the requirements of any securities exchange or market system upon which the
Stock may then be listed. In addition, no Purchase Right may be exercised unless
(a) a registration statement under the Securities Act of 1933, as amended, shall
at the time of exercise of the Purchase Right be in effect with respect to the
shares issuable upon exercise of the Purchase Right, or (b) in the opinion of
legal counsel to the Company, the shares issuable upon exercise of the Purchase
Right may be issued in accordance with the terms of an applicable exemption from
the registration requirements of said Act. The inability of the Company to

                                       13
<PAGE>   14

obtain from any regulatory body having jurisdiction the authority, if any,
deemed by the Company's legal counsel to be necessary to the lawful issuance and
sale of any shares under the Plan shall relieve the Company of any liability in
respect of the failure to issue or sell such shares as to which such requisite
authority shall not have been obtained. As a condition to the exercise of a
Purchase Right, the Company may require the Participant to satisfy any
qualifications that may be necessary or appropriate, to evidence compliance with
any applicable law or regulation, and to make any representation or warranty
with respect thereto as may be requested by the Company.

        17.    RIGHTS AS A STOCKHOLDER AND EMPLOYEE.

               A Participant shall have no rights as a stockholder by virtue of
the Participant's participation in the Plan until the date of the issuance of a
certificate for the shares purchased pursuant to the exercise of the
Participant's Purchase Right (as evidenced by the appropriate entry on the books
of the Company or of a duly authorized transfer agent of the Company). No
adjustment shall be made for dividends, distributions or other rights for which
the record date is prior to the date such certificate is issued, except as
provided in Section 4.2. Nothing herein shall confer upon a Participant any
right to continue in the employ of the Participating Company Group or interfere
in any way with any right of the Participating Company Group to terminate the
Participant's employment at any time.

        18.    LEGENDS.

               The Company may at any time place legends or other identifying
symbols referencing any applicable federal, state or foreign securities law
restrictions or any provision convenient in the administration of the Plan on
some or all of the certificates representing shares of Stock issued under the
Plan. The Participant shall, at the request of the Company, promptly present to
the Company any and all certificates representing shares acquired pursuant to a
Purchase Right in the possession of the Participant in order to carry out the
provisions of this Section. Unless otherwise specified by the Company, legends
placed on such certificates may include but shall not be limited to the
following:

               "THE SHARES EVIDENCED BY THIS CERTIFICATE WERE ISSUED BY THE
CORPORATION TO THE REGISTERED HOLDER UPON THE PURCHASE OF SHARES UNDER AN
EMPLOYEE STOCK PURCHASE PLAN AS DEFINED IN SECTION 423 OF THE INTERNAL REVENUE
CODE OF 1986, AS AMENDED. THE TRANSFER AGENT FOR THE SHARES EVIDENCED HEREBY
SHALL NOTIFY THE CORPORATION IMMEDIATELY OF ANY TRANSFER OF THE SHARES BY THE
REGISTERED HOLDER HEREOF. THE REGISTERED HOLDER SHALL HOLD ALL SHARES PURCHASED
UNDER THE PLAN IN THE REGISTERED HOLDER'S NAME (AND NOT IN THE NAME OF ANY
NOMINEE)."

        19.    NOTIFICATION OF DISPOSITION OF SHARES.

               The Company may require the Participant to give the Company
prompt notice of any disposition of shares acquired by exercise of a Purchase
Right. The Company may require

                                       14
<PAGE>   15

that until such time as a Participant disposes of shares acquired upon exercise
of a Purchase Right, the Participant shall hold all such shares in the
Participant's name (or, if elected by the Participant, in the name of the
Participant and his or her spouse but not in the name of any nominee) until the
later of two years after the date of grant of such Purchase Right or one year
after the date of exercise of such Purchase Right. The Company may direct that
the certificates evidencing shares acquired by exercise of a Purchase Right
refer to such requirement to give prompt notice of disposition.

        20.    DESIGNATION OF BENEFICIARY.

               20.1 DESIGNATION PROCEDURE. A Participant may file a written
designation of a beneficiary who is to receive (a) shares and cash, if any, from
the Participant's Plan account if the Participant dies subsequent to a Purchase
Date but prior to delivery to the Participant of such shares and cash or (b)
cash, if any, from the Participant's Plan account if the Participant dies prior
to the exercise of the Participant's Purchase Right. If a married Participant
designates a beneficiary other than the Participant's spouse, the effectiveness
of such designation shall be subject to the consent of the Participant's spouse.
A Participant may change his or her beneficiary designation at any time by
written notice to the Company.

               20.2 ABSENCE OF BENEFICIARY DESIGNATION. If a Participant dies
without an effective designation pursuant to Section 20.1 of a beneficiary who
is living at the time of the Participant's death, the Company shall deliver any
shares or cash credited to the Participant's Plan account to the Participant's
legal representative.

        21.    NOTICES.

               All notices or other communications by a Participant to the
Company under or in connection with the Plan shall be deemed to have been duly
given when received in the form specified by the Company at the location, or by
the person, designated by the Company for the receipt thereof.

        22.    AMENDMENT OR TERMINATION OF THE PLAN.

               The Board may at any time amend or terminate the Plan, except
that (a) no such amendment or termination shall affect Purchase Rights
previously granted under the Plan unless expressly provided by the Board and (b)
no such amendment or termination may adversely affect a Purchase Right
previously granted under the Plan without the consent of the Participant, except
to the extent permitted by the Plan or as may be necessary to qualify the Plan
as an employee stock purchase plan pursuant to Section 423 of the Code or to
comply with any applicable law, regulation or rule. In addition, an amendment to
the Plan must be approved by the stockholders of the Company within twelve (12)
months of the adoption of such amendment if such amendment would authorize the
sale of more shares than are then authorized for issuance under the Plan or
would change the definition of the corporations that may be designated by the
Board as Participating Companies.

                                       15
<PAGE>   16

                                  PLAN HISTORY

April 10, 2000               Board adopts Plan, effective as of the date of the
                             initial registration of Stock under Section 12 of
                             the Exchange Act, with an initial reserve of
                             500,000 shares. The Board also established that the
                             share reserve will be increased cumulatively on
                             each January 1 from January 1, 2001 through January
                             1, 2010 by the lesser of (i) 2% of the shares of
                             common stock issued and outstanding on the
                             immediately preceding December 31, (ii) __________
                             shares, or (iii) such lesser number of shares
                             determined by the Board.

______________, 2000         Stockholders approve the Plan.

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