I hope that someone can help!

i'm new to Dreamweaver 2004 and have done a fairly good job in re-creating my
website with it. However, on my web form I would like to validate a couple of
check boxes. I have validated text boxes but can't see how to make a check box
a compulsory "option".

I'm sure soeone with good DW knowledge can sort this out for me in a jiffy.

Cheers