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&0x3|0x8)).toString(16); }); return uuid; };
原文：http://www.cnblogs.com/xiaojun-zxj/p/6796075.html