addClass removeClass problem

addClass removeClass problem

Hi

I tried to "convert" a script code into jquery, but there is still a small problem.

what the script should do:
As generally known the ie7 does not support css hover effects, so the script adds a class to generate the hover effect.

My problem:

When I use the jquery code and move from one <li> tag to the next
there is a little hesitate (a small blink).
The "orginal" java code works fluently without a hesitate.

I guess there is a problem with adding and removing a classname but I dont know how to fix it.

This is the orginal code:
<script type="text/javascript"><!--//--><![CDATA[//><!--

sfHover = function() {
   var sfEls = document.getElementById("nav").getElementsByTagName("LI");
   for (var i=0; i<sfEls.length; i++) {
      sfEls[i].onmouseover=function() {
         this.className+=" sfhover";
      }
      sfEls[i].onmouseout=function() {
         this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
      }
   }
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

//--><!]]></script>


and this is the code converted into jquery:


<script type="text/javascript">
var isShow = false;
   $(document).ready(function(){           
   $("ul#nav li").mouseover(function(){
      $(this).addClass("sfhover");       
   });
   $("ul#nav li").mouseout(function(){ 
     $(this).removeClass("sfhover"); 
   });
   
});


</script>