How to create a validated date entry field

I appreciate that SQL has its own methods of date storage.  What I want to do is to ensure that my users can easily enter the correct date first go, rather than receiving a returned error message if they dont.   When I use Dreamweaver to create a date entry field it just gives me a single unformatted field and the user has to enter the slashes as well as the numbers.  What I want to achieve is either   1 Have the field preformatted  eg ../../....   with the user able just to type in the numbers only  OR alternatively I guess I could use three fields of 2,2 and 4 characters and somehow join them before submitting the date to the server.  (Not sure how to join them )

Any help gratefully received.

hyper link, that opens many different links, in either other windows or frames...

Im looking for a way to make a link that when clicked, i can open two pages into custom iframes in the same document. ive tried alot of different wat yet not to many of them are working...