title: Mouse Wheel event always returns less than 0 (down) in firefox? [JQuery]
body: <p>I'm using JQuery to detect if the mousewheel has scrolled up or down, and it works in all browsers except firefox, which always seems to think it's scrolling down.  Any help is appreciated!</p>
  
  <pre><code>$('html,body').bind('DOMMouseScroll mousewheel', function(e){
      if (e.originalEvent.wheelDelta /120 &gt; 0) {
          alert('scrolling up !');
      }
      else {
          alert('scrolling down !');
      }
  });
  </code></pre>
  
  <p>JSFiddle:  <a href="http://jsfiddle.net/Qvs2r/1/" rel="nofollow">http://jsfiddle.net/Qvs2r/1/</a></p>