The preceding function will help you to generate GUID in client side using JavaScript. I hope you like it.
function getGUID() {
var d = new Date().getTime();
var varGuid= 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
var r = (d + Math.random() * 16) % 16 | 0;
d = Math.floor(d / 16);
return (c == 'x' ? r : (r & 0x3 | 0x8)).toString(16);
});
return varGuid;
};