阻止默认滚轮事件

; !function () {
        var keys = { 37: 1, 38: 1, 39: 1, 40: 1 };

        function preventDefault(e) {
            e = e || window.event;
            if (e.preventDefault)
                e.preventDefault();
            e.returnValue = false;
        }

        function preventDefaultForScrollKeys(e) {
            if (keys[e.keyCode]) {
                preventDefault(e);
                return false;
            }
        }
        var oldonwheel, oldonmousewheel1, oldonmousewheel2, oldontouchmove, oldonkeydown
        , isDisabled;
        function disableScroll() {
            if (window.addEventListener) // older FF
                window.addEventListener(‘DOMMouseScroll‘, preventDefault, false);
            oldonwheel = window.onwheel;
            window.onwheel = preventDefault; // modern standard

            oldonmousewheel1 = window.onmousewheel;
            window.onmousewheel = preventDefault; // older browsers, IE
            oldonmousewheel2 = document.onmousewheel;
            document.onmousewheel = preventDefault; // older browsers, IE

            oldontouchmove = window.ontouchmove;
            window.ontouchmove = preventDefault; // mobile

            oldonkeydown = document.onkeydown;
            document.onkeydown = preventDefaultForScrollKeys;
            isDisabled = true;
        }

        function enableScroll() {
            if (!isDisabled) return;
            if (window.removeEventListener)
                window.removeEventListener(‘DOMMouseScroll‘, preventDefault, false);

            window.onwheel = oldonwheel; // modern standard

            window.onmousewheel = oldonmousewheel1; // older browsers, IE
            document.onmousewheel = oldonmousewheel2; // older browsers, IE

            window.ontouchmove = oldontouchmove; // mobile

            document.onkeydown = oldonkeydown;
            isDisabled = false;
        }
        window.scrollHanlder = {
            disableScroll: disableScroll,
            enableScroll: enableScroll
        };
    }();