Hỏi đáp Button_Croll_Down?

<!DOCTYPE html>
<html>
  <head>
    <link rel='stylesheet' href='styles/main.css'>
    </head>
<?php
  function hd($task = ""){
    $name = name;
    echo "<div class='toolbar'></div>";
    echo "<div class='image'>";
      echo "<div class='setter'></div>";
        echo "<h1><font face='Comic sans MS' color='85f96d'>SERVER MINECRAFT VIỆT NAM</font></h1>";
      if($task == ""){
        $query = file_get_contents('http://mcapi.ca/query/saovn.xyz/info');
        $json = json_decode($query, true);
        echo "<h1><a href='/'><button form='footer' class='button'><font size='3' face='Comic sans MS' color='white'>ONLINE:<font color='3366cc'><big> {$json["players"]["online"]}</font></font></button></a></h1>";
      }else {
        echo "<h2><font face='Comic sans MS' color='white'><mark>$task</mark></font></h2>";
        echo "<h1><a href='/'><button class='button'><font size='3' face='Comic sans MS' color='white'>ONLINE:<font color='3366cc'><big> {$json["players"]["online"]}</font></font></button></a></h1>";
      }
    echo "</div>";
  }
?>

body,
input,
button {
    font: 10px 'Trebuchet MS', sans-serif
}

.button {
    padding:15px 30px;
    display: inline-block;
    text-decoration: none;
    border-radius:15px;
    background-color:#00ff99;
}
.button-tiny {
    font-size:12px;
    padding:6px 14px;
}
.button-medium {
    font-size:16px;
    padding:10px 18px;
}
.button-primary {
    font-size:16px;
    padding:10px 18px;
    background:slategray;
    color:#fff;
}
.button-primary:hover {
    background:lightslategrey;
}