<span class="a1"></span>
<span class="a2"></span>

    function ancient(str, line) {
        //计算列度
        var col = Math.ceil(str.length / line);
        //初始化矩阵
        var a = new Array();
        //初始化行数
        for (i = 0; i < line; i++) {
            a[i] = new Array();
        }

        l = 0;
        for (i = 0; i < line * col; i++) {
            a[l].unshift(!!str[i] ? str[i] : "--");
            l += 1;
            if (l > line - 1) {l = 0;}
        }        
        //输出
        var s = "";
        for (i = 0; i < line; i++) {
            s += a[i].join("");
            s += "<br />";
        }
        return s;
    }
    document.write(ancient("我爱你哈哈哈哈", 2));