jquery guid

  function Hexa4() {
                return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);
            }
            function GenerateGuid() {
                return (Hexa4() + Hexa4() + "-" + Hexa4() + "-" + Hexa4() + "-" + Hexa4() + "-" + Hexa4() + Hexa4() + Hexa4()).toUpperCase();
            }

            // USE
            var guid = GenerateGuid();
            //alert(guid);