title: mousewheel event is not triggering in firefox browser
body: <p>Please refer the below code.</p>
  
  <pre><code>$(this.element).on("mousewheel", this.chartMouseWheel);
  
  chartMouseWheel:function(e) {
          if(e.originalEvent.wheelDelta /120 &gt; 0) {
              alert('scrolling up !');
          }
          else{
            alert('scrolling down !');
          }
  
          if (e.preventDefault)
          e.preventDefault();
          e.returnValue = false;
      },
  </code></pre>
  
  <p>this event triggering properly in IE,chrome and not triggering in Firefox ?</p>