title: how to display ajax loading image
body: <p>I want to show ajax loading image. but don't know how to do that. here is my working ajax script. please help me 
  to integrate ajax loading gif.thanks </p>
  
  <pre><code>$(function() { 
      $( "#slider" ).slider({ 
         stop: function(event, ui) {
                $.ajax({
                url: "ajax.php",
                cache: false,
                async: false,
               data: "",
                    success: function(html){
                  $("#result_list").html(html);
                }
              });
  
           }
      });
  });
  </code></pre>