<!--
function random_list(array_func, num) {
    var a_length = array_func.length;
    var array_number =[];
    var array_b = [];
    for (var i =0;i < a_length; i++){
        array_number[i] = i;
    }
    var min_num = Math.min(num, array_func.length);
    var x = min_num;
    while(x-- > 0) {
        var random_num = Math.floor(Math.random() * a_length);
        array_b.push(array_number[random_num]);
        array_number[random_num] = array_number[--a_length];
    }
    document.open();
        for (var i =0; i <  min_num; i++){
        document.write(array_func[array_b[i]]);
    }
    document.close();
}
// -->