September 3, 2013 16:25
diff --git a/jsbin.UBuTEwI.html b/jsbin.UBuTEwI.html
 <!DOCTYPE html>
 <html>
 <head>
  <script src="http://extjs.cachefly.net/ext-4.1.1-gpl/ext-all-debug.js"></script>
    <link rel="stylesheet" href="http://extjs.cachefly.net/ext-4.1.1-gpl/resources/css/ext-all.css">
 <meta charset=utf-8 />
 <title>JS Bin</title>
 </head>
 <body>
  
 </body>
 </html>
diff --git a/jsbin.UBuTEwI.js b/jsbin.UBuTEwI.js
 Ext.onReady(function(){
  var fe = '04/18/2012';
  
  var dt = Ext.Date.add(new Date('8/30/2006'), Ext.Date.DAY, 1);
  //console.log(Ext.Date.format(dt,'d/m/Y'));
  
  var str = fe;
  var pad = str.match(/^(\d{1,2})\/(\d{1,2})\/(\d{4})$/);
  
  datarex = /^(0[1-9]|1[0-2])\/(0[1-9]|1\d|2\d|3[01])\/(19|20)\d{2}$/ ;
  
  var reg = new RegExp(/^(((0[13578]|1[02])\/(0[1-9]|[12]\d|3[01])\/((19|[2-9]\d)\d{2}))|((0[13456789]|1[012])\/(0[1-9]|[12]\d|30)\/((19|[2-9]\d)\d{2}))|(02\/(0[1-9]|1\d|2[0-8])\/((19|[2-9]\d)\d{2}))|(02\/29\/((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))))$/g);
  
  console.log(reg.test(str));
  
  
 });
	<!DOCTYPE html>
	<html>
	<head>
	<script src="http://extjs.cachefly.net/ext-4.1.1-gpl/ext-all-debug.js"></script>
	<link rel="stylesheet" href="http://extjs.cachefly.net/ext-4.1.1-gpl/resources/css/ext-all.css">
	<meta charset=utf-8 />
	<title>JS Bin</title>
	</head>
	<body>

	</body>
	</html>
	Ext.onReady(function(){
	var fe = '04/18/2012';

	var dt = Ext.Date.add(new Date('8/30/2006'), Ext.Date.DAY, 1);
	//console.log(Ext.Date.format(dt,'d/m/Y'));

	var str = fe;
	var pad = str.match(/^(\d{1,2})\/(\d{1,2})\/(\d{4})$/);

	datarex = /^(0[1-9]\|1[0-2])\/(0[1-9]\|1\d\|2\d\|3[01])\/(19\|20)\d{2}$/ ;

	var reg = new RegExp(/^(((0[13578]\|1[02])\/(0[1-9]\|[12]\d\|3[01])\/((19\|[2-9]\d)\d{2}))\|((0[13456789]\|1[012])\/(0[1-9]\|[12]\d\|30)\/((19\|[2-9]\d)\d{2}))\|(02\/(0[1-9]\|1\d\|2[0-8])\/((19\|[2-9]\d)\d{2}))\|(02\/29\/((1[6-9]\|[2-9]\d)(0[48]\|[2468][048]\|[13579][26])\|((16\|[2468][048]\|[3579][26])00))))$/g);

	console.log(reg.test(str));


	});