function trim(stringToTrim)
{
	return stringToTrim.replace(/^\s+|\s+$/g,"");
}




function check()
{


if(trim(document.getElementById("intPin").value) == '')
	{
		alert('Please Enter Email Address.');
		document.getElementById('intPin').focus();
		return false;
	}
	if(trim(document.getElementById('intPin').value)!="")
	{
		var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
		var ans = document.getElementById('intPin').value.match(emailExp);
		if(ans!=document.getElementById('intPin').value)
		{
			alert("Please Enter Valid Email.");
			document.getElementById('intPin').focus();
			return false;				
		}
	}
}