Zip Validation

[Asim]

Hi
I want to validate the zip in a form.
When a user select his state and put zip in the textbox then it should be validate accordng to his selected state and give an alert.
Please help
Asim

[Khalid Ali]

You need to find out the rules according to which american zip codes are devised...
On the other hadn if you query google you may find out that some one already have written a code for this
Edit
Inc ase you are still looking for it
here is one I found

http://javascript.internet.com/forms/val-zip-code.html