title: clearInterval doesn't work in a .hover event
body: <p>I can't understand why clear interval doesn't work in my .hover event:</p>
  
  <pre><code>        &lt;div id="area_list" class="container"&gt;
          &lt;div class="row clearfix"&gt;
              &lt;div class="col-md-12 column"&gt;
                  &lt;h2&gt;
                  le nostre aree di pratica
                  &lt;/h2&gt;
                  &lt;ul class="list-unstyled list-inline"&gt;
                      &lt;li class="first_in_row"&gt;
                          &lt;a href="#"&gt;
                              &lt;img src="img/list_arrow.png" alt="list_arrow" width="10" height="16" /&gt;
                              Lorem ipsum
                          &lt;/a&gt;
                      &lt;/li&gt;
                      &lt;li&gt;
                          &lt;a href="#"&gt;
                              &lt;img src="img/list_arrow.png" alt="list_arrow" width="10" height="16" /&gt;
                              Lorem ipsum
                          &lt;/a&gt;
                      &lt;/li&gt;
                  &lt;/ul&gt;
              &lt;/div&gt;
          &lt;/div&gt;
      &lt;/div&gt;
  
  &lt;script&gt;
  var move_right;
  
  function movimento_avanti(el) {
  
      $('a img', el).stop().animate({
  
          'margin-left' : '4px',
          'margin-right' : '0'
  
      },500,function() {
  
          movimento_indietro(el);
  
          });
  
  }
  
  function movimento_indietro(el) {
  
      $('a img', el).stop().animate({
  
          'margin-left' : '0',
          'margin-right' : '4px'
  
      },500,function() { 
  
          movimento_avanti(el); 
  
          });
  
   }
  
  $(document).ready(function() {
  
      $('#area_list li').hover(function() {
  
          move_right = setInterval(movimento_avanti($(this)), 100);
  
      }, function() {
  
          clearInterval(move_right);
  
      });
  
  });
  &lt;/script&gt;
  </code></pre>
  
  <p>It seems is the param I pass in the setInterval to create some problems... but I need it to move just the hovered element.</p>
  
  <p>Thanks in advance for your help.</p>