var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i
	
	function checkField(f) {
		if (f==null || f=="")
		{
			return false;
		}
		else return true;
	}

	function validateEmail(field) {
		return emailfilter.test(field);
	}