js產生一個以零開頭的八位元並且依次遞增

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條件：1八位元；2.以領開頭；3.末尾要依次遞增

<script type="text/javascript">function RondomPass(number){    var arr = new Array;    var arr1 = new Array("0","1","2","3","4","5","6","7","8","9");        for(var i=0;i<number;i++){        var n = Math.floor(Math.random()*10);        arr[i] =arr1[n] ;        //document.write(arr1[n]);        }        val = arr.join("")    //document.write(val);    return val;        }function Account(num,a){     // num以領開頭的8位元，a依次遞增        //初始的a為數字    var s = a.toString();   // 數字轉字串    var b =s.split("");    //字串轉數組    var c = num-b.length;    var e= new Array;    for(var i=0;i<c;i++){        e[i] = 0;      }    var f = e.join("");    //數組轉字串        return f;        } var num = ‘30‘;     for(var i=0;i<num;i++){    document.write("賬戶");    document.write(Account(8,i)+i);    document.write("&nbsp;&nbsp;");        document.write("密碼");    document.write(RondomPass(8));    document.write("</br>");    }</script>