How to detect Scroll down and scroll up event using jQuery?

Use the following script to detect scroll up and scroll down events

<script type="text/javascript">

$(document).ready(function(){

var LastScroll=0;

  //  I am using div element's scroll here.
    $("div").scroll(function(){

         if(LastScroll<$("div").scrollTop())
         {
              //scroll down event
          }
          else
           {
                //scroll up event
            }

             LastScroll=$("div").scrollTop();

     });

})
</script>