Date picker - need help

i was looking for a free date picker in the internet for my web-site that is still in a development stage. i found one on URL .

i find it as a well done thing, but i would like to add some features. and since i know nothing about software development i would really appreciate some help to custumize the picker (i.e. add pop-up notes to dates, change navigation and size and so on).

i'm sorry i couldn't get source code from the software, but i think you can see on the developers site (URL )

thank in advace

I saw this same calendar just last week, and I am trying to get pop ups to come up when the mouse is over the date. This has great potential.