(function($) {
    $.fn.hoverIntent = function(f, g) {
        var cfg = {
            sensitivity: 7,
            interval: 100,
            timeout: 0
        };

        cfg = $.extend(cfg, g ? { over: f, out: g} : f);

        var cX, cY, pX, pY;

        var track = function(ev) {
            cX = ev.pageX;
            cY = ev.pageY;
        };

        var compare = function(ev, ob) {
            ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t);

            if ((Math.abs(pX - cX) + Math.abs(pY - cY)) < cfg.sensitivity) {
                $(ob).unbind("mousemove", track);
                ob.hoverIntent_s = 1;
                return cfg.over.apply(ob, [ev]);
            }
            else {
                pX = cX; pY = cY;
                ob.hoverIntent_t = setTimeout(function() {
                    compare(ev, ob);
                }, cfg.interval);
            }
        };

        var delay = function(ev, ob) {
            ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t);
            ob.hoverIntent_s = 0;
            return cfg.out.apply(ob, [ev]);
        };

        var handleHover = function(e) {
            var p = (e.type == "mouseover" ? e.fromElement : e.toElement) || e.relatedTarget;

            while (p && p != this) {
                try { p = p.parentNode; }
                catch (e) { p = this; }
            }

            if (p == this) {
                return false;
            }

            var ev = jQuery.extend({}, e);
            var ob = this;

            if (ob.hoverIntent_t) {
                ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t);
            }

            if (e.type == "mouseover") {
                pX = ev.pageX; pY = ev.pageY;
                $(ob).bind("mousemove", track);

                if (ob.hoverIntent_s != 1) {
                    ob.hoverIntent_t = setTimeout(function() {
                        compare(ev, ob);
                    }, cfg.interval);
                }
            }
            else {
                $(ob).unbind("mousemove", track);

                if (ob.hoverIntent_s == 1) {
                    ob.hoverIntent_t = setTimeout(function() {
                        delay(ev, ob);
                    }, cfg.timeout);
                }
            }
        };

        return this.mouseover(handleHover).mouseout(handleHover);
    };
})(jQuery);