Not allow the user to register future date,if register future date and then it will alert invalid date.Please Help.....
How to set validation date in javacript???

Code:
<table width="100%" border=0 cellspacing="0" cellpadding="5">

<script type='text/javascript'>
function formValidator(){
	// Make quick references to our fields
	var username       = document.getElementById('username');
...