DatePicker combined fixes

[Marilen Corciovei <le...@nemesisit.rdsnet.ro>]

After trying testing the DatePicker component on various platform I had
to modify the DatePicker a few times to make it work ok on:
- linux with mozilla compatible browsers
- windows with either IE6 or mozilla based browsers

The attached patch fixes the following 2 problems:

- invalid positioning with mozilla (I succesfully applied the solution
from
http://article.gmane.org/gmane.comp.java.tapestry.user/6257/match=patch+datepicker)
- mixed content problem when using the DatePicker with https.
This problem is related to the line 572 in DatePicker.js:
underDiv.innerHTML = "<iframe width=\"100%\" height=\"100%\"
frameborder=\"0\"></iframe>";

Commenting this line seems not to cause any problem. Any alternative
solutions are welcome.

Hopping it will help, Len

Marilen Aretius Corciovei
Independent J2EE, Linux consultant
http://nemesisit.rdsnet.ro/len
http://www.nemesisit.ro