javascript生成随机数,javascript生成唯一标识

代码 function getUUID() { var s = []; var hexDigits = "0123456789abcdef"; 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 0010 s[19] = hexDigits.substr((s[19] & 0x3) | 0x8, 1); // bits 6-7 of the clock_seq_hi_and_reserved to 01 s[8] = s[13] = s[18] = s[23] = ""; //"" 引号里面可以加任意字符，代表拼接的意思，如果不加就是 纯32位支付 var uuid = s.join(""); return uuid; }