function isEmail(s){
			var i = 1;
			var sLength = s.length;
			while ((i < sLength) && (s.charAt(i) != "@")){ i++ }
			if ((i >= sLength) || (s.charAt(i) != "@")) return false;
				else i += 2;
			while ((i < sLength) && (s.charAt(i) != ".")){ i++ }
			if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
				else return true;
		}
        function validateForm(form){
			if(!isEmail(form.txtemail.value)){
				alert("Please enter a valid Email Address...");
				//form.textemail.focus();
				return false;
			}
			return true;
		}