jQUERY - AJAX

HTML

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
  $("button").click(function(){
  	
    var method="GET";
    var url="http://www.server.cz/engine-ajax.php";
    var data="?data1=PrvniData&data2=DruhyData";
  
    $.ajax({
        type: method,
        url: engine,
        data: data,
        cache: false,
        success: function(html){
          if(html){
            //window.location.href = "./";
            location.reload();
          }else {
            $('#VOXloadUni').hide();
            $(output).html('Bad login data!');
          }
        }
      });
  });
});
</script>
</head>
<body>

<div id="div1"><h2>jQUERY AJAX změní tento text</h2></div>

<button>Získat externí obsah</button>

</body>
</html>