转换一个矩阵（2维数组）为HTML Table

matrix[row][col],比如[ [ "Name", "Age" ], [ "Sam", 12 ] ]

    function (m) {
        var s = '';
        for (var i in m) {
            s += '<tr>';
            for (var j in m[i])
                s += '<td>' + m[i][j] + '</td>';
            s += '</tr>';
        }
        return s;
    }

测试