man dats k but i suppose ud have e habit of eval.google.com ;-)
neways
we can do it in the click event of the verify button( in the form we can have a text box accepting the value of the email id and a label(optional) signifying what the text box shud contain. then a command button wherein the click button shud have the code snippet
u can probably use the ischar() to check the value of spl charecters and @ in a seperate variable we can split evrything and parse it into one single entity and compare
that shud solve your problem.