(function(b){function d(a){var f=[].slice.call(arguments,1),e=0;a=b.event.fix(a||window.event);a.type="mousewheel";if(a.wheelDelta)e=a.wheelDelta/120;if(a.detail)e=-a.detail/3;f.unshift(a,e);return b.event.handle.apply(this,f)}var c=["DOMMouseScroll","mousewheel"];b.event.special.mousewheel={setup:function(){if(this.addEventListener)for(var a=c.length;a;)this.addEventListener(c[--a],d,false);else this.onmousewheel=d},teardown:function(){if(this.removeEventListener)for(var a=c.length;a;)this.removeEventListener(c[--a],
d,false);else this.onmousewheel=null}};b.fn.extend({mousewheel:function(a){return a?this.bind("mousewheel",a):this.trigger("mousewheel")},unmousewheel:function(a){return this.unbind("mousewheel",a)}})})(jQuery);