I try to built a popup html form field calendar but NOT work

[leonidassavvides]

http://www.poliscarhire.com/Templates/main-home.dwt
http://www.poliscarhire.com/Templates/main-home2.dwt

I try to built a popup html form field calendar (js) from:
http://www.htmlarea.com/directory/Detailed/229.html from Dynarch.com
but do NOT function/work[see above webpages/templates source] ?

can you help ?

[leonidassavvides]

There's also conflict with a local (Paphos-Cyprus-EU) Time/date script on top(see below), what to rename in js script ?
http://www.poliscarhire.com/Templates/main-home.dwt

"Date/time" javascripts can work externally ? below does not work ? I commented code and add the same to an external file(.js)
<script type="text/javascript" src="cal/timedate.js"></script>

http://www.poliscarhire.com/Templates/main4dateworkext.dwt

time/date work embed at
http://www.poliscarhire.com/Templates/main4.dwt
but not get validated with w3c validator ...(NON Valid).