JavaScript Simple GUID Generator

javascript-simple-guid-generator

// internal function to generate a random number guid generation
var S4 = function() {
	return (((1+Math.random())*0x10000)|0).toString(16).substring(1);
};

// generates a guid for adding items to array
var createGUID = function () {
	return (S4() + S4() + "-" + S4() + "-4" + S4().substr(0,3) + "-" + S4() + "-" + S4() + S4() + S4()).toLowerCase();
};

var guid = createGUID();