Problem mit Mootools' Click-Event im IE6

[KillUrMind]

Hai,
leider funktioniert der Click-Event in folgendem Code im IE6 nicht. Kann mir jemand sagen, wie ich den zum Laufen bekomme?

<script language="javascript" type="text/javascript">
   var opened = 0; 
   var current = 0; 
   window.addEvent('domready', function() { 
      var myVerticalSlide1 = new Fx.Slide('show1_slide');
      myVerticalSlide1.hide();
      document.getElementById('show1_slide').style.display = 'block';
      $('slideShow1').addEvent('click', function(e){ 
         stop(e); 
         current = 1; 
         if (opened != 0) { 
            if (current != opened) {  
               eval('myVerticalSlide'+opened).slideOut(); 
            } 
         } 
         myVerticalSlide1.toggle(); 
         opened = 1; 
      }); 
   }); 
</script>