Function to generate random number every single time in javascript.

uniqueID.js

function create_UUID() {
         var dt = new Date().getTime();
         var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
            var r = (dt + Math.random() * 16) % 16 | 0;
            dt = Math.floor(dt / 16);
            return (c == 'x' ? r : (r & 0x3 | 0x8)).toString(16);
         });
         return uuid;
      }