UID 自动生成ID

1.自动生成ID  类型如 5C1C2052-4B7C-4332-8745-7E98AF7FC09A

function uuid() {var s = [];var hexDigits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";for(var i = 0; i < 36; i++) {s[i] = hexDigits.substr(Math.floor(Math.random() * 0x10), 1);}s[14] = "4"; // bits 12-15 of the time_hi_and_version field to 0010s[19] = hexDigits.substr((s[19] & 0x3) | 0x8, 1); // bits 6-7 of the clock_seq_hi_and_reserved to 01s[8] = s[13] = s[18] = s[23] = "-";var uuid = s.join("");return uuid;}var UIDs = uuid(); //自定义IDconsole.log('UID:' + UIDs);