Calendar script
You can use this toy to pick a date. w00t.
Pick a date:
Additional stylesheets are available.
Use it yourself
The calendar code is composed of a javascript file and a CSS stylesheet. To add it to your page, first downoad the calendar archive.
For each field you want to calendar-ify, add an onChange to the field, then place an empty div where you want the final calendar. The javascript method needs to know the id of the field, as well as the id of the empty calendar div. You can include as many of these as you like on one page - just make sure all the ids are unique!
Example:
<input id="date" name="date" onClick="inputNewDate(this.id, 'calendar')"/>
<div id="calendar" class="calendar"/>
<div id="calendar" class="calendar"/>