function generateUUID(){     var d = new Date().getTime();     var uuid = '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&0x7|0x8)).toString(16);     });     return uuid; };


我选用的是上面这个