Generate UUID using Simple JavaScript Function
var generateGuid = function () {
function s4() {
return Math.floor((1 + Math.random()) * 0x10000).toString(16).substring(1);
}
return s4() + s4() + '-' + s4() +
'-' + s4() + '-' + s4() + '-' + s4() + s4() + s4();
};
console.log(generateGuid());