optimisation part 1

optimisation of:
- connect to db
- make a function that
-- post the query
-- get columns info
-- generate an automated XML result file

adapt the web client page for the new columns name (TO BE AUTOMATED)
extra the xmlhttprequest to a generic script

the xmlhttprequest is now in the generic myAjaxLib.js.
the resonse is sent to a callbacked function
can now extract columns header

a table is generated based on the columns name extracted from from the
xml response
Get the comumns info from the xmlresponse