What is the best calendar pop-up to populate a web form?

Question

I want to be able to make an HTTP call updating some select boxes after a date is selected. I would like to be in control of updating the textbox so I know when there has been a "true" change (in the event the same date was selected). Ideally, I would call a function to pop-up the calendar and be able to evaluate the date before populating the text box...so I can do my validation before making a server call.

Answer 1

JQuery's datepicker is an extremely flexible tool. With the ability to attach handlers prior to opening or after date selection, themes, range selection and a variety of other incredibly useful options, I've found that it meets all my needs.

The fact that I sit next to one of its maintainers here at work is also fairly useful...

Answer 2

I've been playing with the jquery datePicker script - you should be able to do everything you need to with this.

Answer 3

YUI and ExtJs both have very nice looking and flexible calendars.