1. 生成32位數字(字母)函式 例項程式碼如下

 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;
        };



console.log(generateUUID()); //結果如下  ：11161cae5-39d5-441e-a584-2a069fcb4b59