uuid javascript语言代码
function uuid() { return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) { var r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8); return v.toString(16); }); } var userID=uuid(); //something like: ec0c22fa-f909-48da-92cb-db17ecdb91c5