(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);