全球唯一标识符合，js前端生成GUID！！！

var id = guid(); /** *获取唯一id */ function guid() { return ‘xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx’.replace(/[xy]/g, function© { var r = Math.random()*16|0, v = c == ‘x’ ? r : (r&0x3|0x8); return v.toString(16); }); }