Document:

Exhibit 10.3

[LETTERHEAD OF POWERRAISE, INC.]

                          Website Maintenance Agreement

This Agreement is entered into on this 6th day of July 2005, by and between:

POWERAISE INC, a Nevada  Corporation,  with offices  located at #303 - 1687 West
Broadway, Vancouver BC Canada V6J 1X7, hereinafter referred to as "THE COMPANY"

and

ITAMAR  DAVID an  individual,  hereinafter  referred  to as  "DAVID" of 13 Ahuza
Street, Karkur, ISRAEL 37075

WHEREAS "the Company" owns and operates a website (www.poweraise.com) and;

WHEREAS "David" is in the business of maintaining corporate websites and;

WHEREAS "the  Company"  wishes to retain the services of "David" to maintain its
website.

THEREORE  in  consideration  of the mutual  promises  set forth  hereunder,  the
sufficiency of which is hereby acknowledged,  "the Company" and "David" agree as
follows:

     In  return  for  ongoing  website  maintenance  for a period  of 24  months
     effective with the execution of this Agreement, "the Company" agrees to pay
     "David"  the  sum of  $10,000  USD  within  30  days  of the  date  of this
     Agreement. "David" agrees to provide all required maintenance to the extent
     required for the proper ongoing  operation of the company's website on a 24
     hour / 7 days per week / 365 day per year basis.

Time shall be of the essence in the performance of this Agreement.

If any  part of  this  Agreement  is held  unenforceable  for  any  reason,  the
remaining  portion of this Agreement shall remain in full force and effect,  and
shall be carried out in a manner which is consistent  with the intentions of the
parties hereto.
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If any legal  action or  proceeding,  including  any  arbitration  of  disputes,
arising  out of, or  relating  to,  this  General  Contract is brought by either
party, the prevailing  party as determined by the Court or Arbitrator,  shall be
entitled  to receive  from the  non-prevailing  party,  in addition to any other
relief that may be  granted,  reasonable  attorney's  fees,  costs and  expenses
incurred in the action or proceeding by the prevailing party.

For the  purposes of this  Agreement  and in the event of a dispute  between the
parties to this  Agreement,  the laws of the Province of British  Columbia  will
prevail  and  both  parties  agree  to be  subject  to the  jurisdiction  of any
competent provincial court in British Columbia.

This  Agreement  is entered into on this 6th day of July,  2005,  in the City of
Vancouver in the Province of British Columbia, Canada.

POWERAISE INC.                              ITAMAR DAVID, an individual

By: /s/ Ruth Navon                           By: /s/ Itamar David
   ------------------------                     -------------------------
Name: Ruth Navon                             Name: Itamar David
Title: PresidentEXHIBIT 10.1

This Agreement is dated December 1, 2006.

BETWEEN:

          CAVIT SCIENCES, INC

          (the "Contractor")

AND:      JULIO DE LEON

          (the "Sub-Contractor")

WHEREAS:
The Company is located  within the state of Florida and is presently  engaged in
the business of testing  immunostimulants  and marketing its patent  application
rights to major drug companies (the "Business");  and the Sub-Contractor desires
to enter into this  Agreement  with respect to its  services to the  Contractor,
upon the terms and conditions hereinafter set forth.

NOW THEREFORE THIS AGREEMENT  WITNESSES that in  consideration  of the premises,
covenants and mutual provisions set forth herein,  the parties agree as follows:

1.   The Contractor shall retain the Sub-Contractor and the Sub-Contractor shall
     assist the Contractor upon the terms and conditions hereinafter set forth.

2.   The term of this Agreement shall commence on the 1st day of November,  2006
     (due to prior  services  provided to  Contractor  by  Sub-Contractor),  and
     terminate on the 31st day of October,  2007 (the "Term")  unless renewed or
     terminated  prior to that date as set out  hereinafter.  This Agreement and
     the Term will automatically  renew for additional one (1) year terms unless
     the Contractor  notifies the Sub-Contractor in writing not less than thirty
     (30) days prior to the  expiration  of the initial term or any renewal term
     that it does not wish to renew the Agreement.

3.   During  the  Term,  the  Sub-Contractor  shall  have the full and  complete
     obligation and responsibility for the performance of the duties and/or work
     as Chief Financial Officer and the Sub-Contractor shall be obligated to the
     Contractor for the  performance of all such duties and/or work.  During the
     period  hereof,  the  Sub-Contractor  shall assist the Contractor and shall
     perform any and all services  required or requested in connection  with the
     Contractor's   business.   Within  the  limitations  herein  provided,  the
     Sub-Contractor  will render such  services of an advisory  nature as may be
     requested from time to time by the Contractor.

4.   During the term of this  Agreement,  the  Sub-Contractor  and its  Nominees
     shall devote 30% of his time to the  performance  of its duties  hereunder.
     Any unused  time shall not carry  forward and will be measured on a monthly
     basis.

5.   The Contractor shall compensate the  Sub-Contractor  $60,000 per year which
     shall be paid quarterly at the beginning of each quarter in accordance with
     this  contract.  The first such  payment  is  $15,000  and will be due upon
<PAGE>
     execution of this Agreement.  The  Sub-Contractor has agreed that the first
     payment will be made in restricted common stock of the Contractor valued at
     $.08 per share.  The  Sub-Contractor  shall  have the  option of  receiving
     subsequent  quarterly payments in cash or restricted stock by notifying the
     Contractor prior to the payment date. Any payments  requested to be made in
     cash will be paid if Company funds are available to pay the Sub-Contractor,
     otherwise  they  will be  accrued  until  such  payment  can be  made.  Any
     restricted stock in the hands of the  Sub-Contractor  shall have piggy back
     registration  rights to any  filings  which the  Company may make under the
     1933 or 1934  Securities act. Such  communications  may be made by phone or
     fax to the Company`s then current headquarters.

6.   The  Sub-Contractor   shall  quarterly  during  the  Term  provide  to  the
     Contractor an invoice for reasonable out-of-pocket expenses incurred by the
     Sub-Contractor in performing the duties outlined above. These expenses must
     be authorized by the Contractor, in writing, prior to being expensed by the
     Sub-Contractor.

7.   The  Sub-Contractor is retained by the Contractor only for the purposes and
     to the  extent  set  forth  in  this  Agreement  and  the  Sub-Contractor's
     relationship to the Contractor shall, during the term of this Agreement, be
     that of an Independent Contractor.  The Contractor shall not withhold, from
     sums  becoming  payable to the  Sub-Contractor  hereunder,  any amounts for
     Income Tax, employment  insurance premiums,  or other withholding  amounts,
     during  the  term  of  this  Agreement.  The  Sub-Contractor  shall  not be
     considered as having an employee status or as being entitled to participate
     in any plans, arrangements or distributions by the Contractor pertaining to
     or in connection with any pension,  stock,  bonus,  profit sharing or other
     benefit  (including  any  group  health,  dental or life  insurance  plans)
     extended to the Contractor's employees.

8.   Nothing in this Agreement shall be construed to interfere with or otherwise
     affect the rendering of services by the  Sub-Contractor  in accordance with
     its independent and professional judgment. The Sub-Contractor shall perform
     its services  substantially in accordance with generally accepted practices
     and principles of its trade.  This Agreement  shall be subject to the rules
     and regulations of any and all  organizations and associations to which the
     Sub-Contractor may from time to time belong and to the laws and regulations
     governing the practice of the Sub-Contractor's trade.

9.   This Agreement may be terminated at any time,  with cause,  by either party
     upon ninety (30) days written notice.

     Either party will have the right to terminate  this  Agreement  immediately
     upon written notice at any time if:

     (a)  The other party is in material breach of any warranty, term, condition
          or covenant  of this  Agreement  and fails to cure that breach  within
          thirty (30) days after written  notice of that breach and of the first
          party's intention to terminate;

     (b)  The other  party:  (i)  becomes  insolvent;  (ii) fails to perform its
          obligations  in the  ordinary  course  of  business;  (iii)  admits in
          writing its  insolvency  or inability to perform its  obligations;  or
          (iv) becomes the subject of any voluntary or involuntary proceeding in
          bankruptcy,  liquidation,  dissolution,  receivership,  attachment  or
          composition or general assignment for the benefit of creditors that is
          not  dismissed  with  prejudice  within  thirty  (30)  days  after the
          institution of such proceeding.

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<PAGE>
          Termination   under   subsection  (a)  above  will  become   effective
          automatically  upon  expiration of the cure period in the absence of a
          cure.   Termination   under   subsection  (b)  will  become  effective
          immediately  upon written  notice of termination at any time after the
          specified  event or the  failure  of the  specified  proceeding  to be
          timely dismissed.

          Upon termination, any compensation paid to the Sub-Contractor that has
          not been earned by the Sub-Contractor must be immediately  returned by
          Sub-Contractor to Contractor.

10.  Notice.  Any notice required to be given hereunder shall be given by e-mail
     or  telephoned  and  shall  be  deemed  given   immediately   upon  such  a
     communication being made.

11.  Income Tax  Designation.  In the event that the  Internal  Revenue  Service
     should  determine that the  Sub-Contractor  or its Nominee is, according to
     applicable guidelines or legislation,  an employee subject to withholdings,
     such as but not  limited  to  income  tax,  employment  insurance  or other
     statutory  contributions,  the  Sub-Contractor  shall  acknowledge that all
     payments to the Sub-Contractor  are gross payments,  and the Sub-Contractor
     is responsible for all income taxes employment insurance or other statutory
     contributions in respect thereof.

12.  All disputes,  controversies or claims arising out of, or relating to, this
     agreement,  or the making,  performance or interpretation of this agreement
     among the  parties  shall be finally  and  conclusively  settled by binding
     arbitration.  A party to a  dispute  may  commence  an  arbitration  of the
     dispute  by  notifying  the other  party to the  dispute  in writing of its
     desire to submit  the  dispute  to  arbitration  and such  dispute  will be
     submitted to arbitration in accordance with the following:

     (a)  the arbitration will be conducted by a single  arbitrator agreed to by
          the parties,  and if no agreement is reached  within 30 days after the
          notice which requested the arbitration, the appointment shall be made,
          on request of a party,  by the applicable  court in the county of Palm
          Beach, State of Florida

     (b)  the parties agree that the decision of the  arbitrator,  including any
          decision  as to costs  shall  be  final  and  shall  not be  appealed,
          provided  that  the  party  prevailing  in the  arbitration  shall  be
          permitted to initiate and prosecute  judicial  proceedings  to enforce
          the award of the arbitrator. Each of the parties hereby agrees that it
          shall submit to the  jurisdiction  of any court in which such judicial
          enforcement proceedings are brought.

     (c)  Except  as  expressly   provided  herein,  all  arbitrations  will  be
          conducted according to the laws governing  commercial  arbitrations in
          the State of Florida.  Any dispute  referred  to  arbitration  will be
          dealt  with on an  expeditious  basis  with  both  parties  using  all
          reasonable  commercial  efforts  to  obtain  and  implement  a  timely
          decision of the arbitrator.

     (d)  All  costs of  arbitration  under  this  section  shall be paid by the
          parties to the dispute being arbitrated in such amount and proportions
          as the arbitrator may  determine.  If the arbitrator  does not make an
          award of costs,  the parties  shall bear the costs of the  arbitration
          equally and each party shall bear its own costs.

     (e)  Unless  otherwise  mutually  agreed  by  the  parties,  the  place  of
          arbitration shall be Palm Beach County, State of Florida.

13.  The Sub-Contractor  agrees with the Contractor that at all times during the
     term of this Agreement or any renewal and thereafter,  for a period of five
     (5) years, it will hold in strictest confidence, and not use or disclose to

                                       3
<PAGE>
     anyone outside the Contractor  without express  authorization of an officer
     of the  Contractor,  any  confidential  or  proprietary  information of the
     Contractor, including without limitation, concepts, techniques,  processes,
     designs, cost data, and other technical know-how, financial,  marketing and
     other  business  information,  or any other trade secrets of the Contractor
     disclosed  by  the  Contractor  to   Sub-Contractor   or  obtained  by  the
     Sub-Contractor  through  observation  or  examination  of the  Contractor's
     customers  or  suppliers,  including  the  identity of such  customers  and
     suppliers and any information the Contractor has received from others which
     the Contractor is obligated to treat as confidential or proprietary.

14.  The  Sub-Contractor  hereby assigns to the  Contractor,  its successors and
     assigns, all right, title, and interest to the work Sub-Contractor performs
     for the  Contractor  and in all renewals and  extensions of the  copyrights
     that may be secured  under the laws now or hereafter in force and effect in
     Canada or in any other  country  or  countries.  The  Sub-Contractor  shall
     execute  and  deliver  such  instruments  and take  such  action  as may be
     required  to  carry  out  the  copyright  assignment  contemplated  by this
     paragraph.

15.  The  Sub-Contractor  recognizes that the Contractor has received and in the
     future will receive from third parties their  confidential  or  proprietary
     information subject to a duty on the part of the Contractor to maintain the
     confidentiality  of such information and to use it only for certain limited
     purposes.  The  Sub-Contractor  owes the  Contractor and such third parties
     during the term of this  Agreement  work and  thereafter a duty to hold all
     such  confidential or proprietary  information in the strictest  confidence
     and to not disclose it to anyone  (except as necessary in carrying out work
     for the Contractor  consistent  with the  Contractor's  agreement with such
     third party). Sub-Contractor shall not use such information for the benefit
     of anyone other than the  Contractor or such third party,  consistent  with
     the Contractor's agreement with such third party.

16.  At the  time  that  Sub-Contractor's  work  for the  Contractor  concludes,
     Sub-Contractor  will return or cause to be returned to the  Contractor  all
     notes, memoranda,  specifications,  designs, devices, documents,  diskettes
     and any other media or material  containing or disclosing any  confidential
     or proprietary  information of the Contractor or its customers or suppliers
     or third parties.  The  Sub-Contractor  will not keep in its possession any
     such media or materials without the Contractor's written approval except as
     required by applicable government regulations.

17.  The Sub-Contractor agrees not to induce or attempt to influence directly or
     indirectly  any  employee  of  the  Contractor  to  terminate  his  or  her
     employment with the Contractor and work for Sub-Contractor.

18.  No party may assign or transfer any of its rights or obligations  hereunder
     without the prior written consent of all other parties,  which consents may
     be arbitrarily or unreasonably withheld.

19.  The covenants,  promises,  terms and conditions  contained  herein shall be
     binding upon Sub-Contractor and the Contractor.

20.  The parties  hereto shall  execute such further and other  documents and do
     such  further and other  things as may be  necessary  to carry out and give
     effect to the intent of this Agreement.

                                       4
<PAGE>
IN WITNESS WHEREOF,  the parties have hereunto set their hands and seals the day
and year first above written.

CAVIT SCIENCES, INC

By: /s/ Colm J. King
   ------------------------------------
   Colm J. King, CEO

JULIO DE LEON

By: s/ Julio De Leon
   ------------------------------------

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