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Javascript Form Validation

It's real simple.

All you need to do is call a javascript function in a html  "onsubmit" in the form tag as a javascript return, like this

     <form method="post" action="dosomething.php" onsubmit="return validateForm();">


If the code completes ok, the form is then sent to the page listed in "action"

http://www.w3schools.com/js/js_form_validation.asp

If the function specified in the onsubmit returns false, then the form is not sent to the page mentioned in action.

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