Here's a [JSFiddle example][1] showing my code:

    <input type="checkbox">

    $(":checkbox").on("click", function(event) {
        if (event.originalEvent.detail != 0) {
            alert("checkbox clicked");
        } else {
            alert("Not clicked");
        }
            
    });  
    
      e = jQuery.Event("click")
      e.originalEvent = {
          detail: 1
      }
      $(":checkbox").trigger(e)

In firefox, this will alert "Not Clicked". Shouldn't it alert "checkbox clicked" since I set detail = 1?

[1]: http://jsfiddle.net/WudVC/