// validate comment post values	
    function submitError(frm)
	{
		var sender_name = frm.elements["sender_name"];
		var comment = frm.elements["comment"];
		var sender_email = frm.elements["sender_email"];

		var numErr       = 0;
		var errMsg       = "";
		var errElem      = new Array();
		var validEmail   = false;
		var errors       = false;
		var separator    = ", ";

		if (!isEmpty(sender_email))
		{
			validEmail = (emailValidator(sender_email));
		}

		if (!validEmail)
		{
			errMsg = errMsg + "The Email address is not valid";
			alert (errMsg);
		}
		else
		{
			frm.submit();
		}
	}
	
	function emailValidator(elem)
	{
		var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
		if(elem.value.match(emailExp))
		{
			return true;
		}else
		{
			return false;
		}
	}

	function isEmpty(elem)
	{
		if (elem == null || elem.value == null || elem.value.length == 0)
		{
			return true;
		}
		return false;
	}