<head>
<title>Generate GUID using JavaScript by DevCurry.com</title>
<script type="text/javascript">
function G() {
return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1)
}
var guid = (G() + G() + "-" + G() + "-" + G() + "-" +
G() + "-" + G() + G() + G()).toUpperCase();
alert(guid);
</script>
</head>原文：http://blog.csdn.net/dracotianlong/article/details/18737655