What's the simplest method of adding a date field in a form in DW(CS3)?

Question

I'm creating a form that among other things has a date field where the user will need to input a date. I'd like to make it a standard date field where as soon as the user clicks on the field they get a pop-up of a mini calendar to select a date from. Anybody knows the simplest way to achieve this in DW? I should mention that I still use DW CS3. Possibly a known free widget of some sort?
I should add that if possible I'd like to make this a mandatory field - much like Spry Validation works with the common components of a form (e.g. text field or checkbox). Would that be possible to do if the code supplied for date field was external (as at seems DW doesn't have a date field feature internally)?

Answer 1

Thanks again. There's one other thing I wanted to achieve here. I need the date format to be displayed like "dd/mm/yyyy" and not like it's doing by default at the moment (i.e. mm/dd/yyyy)
I don't have any knowledge of jQuery but had a go anyway at trying to fix this using this link http://api.jqueryui.com/datepicker/ as aid to try adjust my code. Obviously I couldn't get it to work so far...  So I'm looking for a little bit of help from anyone who knows a bit of jQuery.
Here's the original default code (just the stuff that goes in the 'head' of the page):
<script>
  $(function() {
      $( "#datepicker" ).datepicker();
</script>
And here's what I tried adding to make it work:
<script>
  $(function() {
      $( "#datepicker" ).datepicker();
      $.datepicker.formatDate( "dd/mm/yyyy" );
</script>
Obviously I tried other combinations including .parseDate instead of .formatDate etc etc none of which worked.
I'm wondering whether the extra code should perhaps go inside where the XXs are - $( "#datepicker" ).datepicker(XX)
Anyway, if somebody could help me out that would be great. Cheers!