鼠标滚轮脚本在IE中出错

Question

好的，这是一个有效的跨浏览器代码，其缓解效果很好：

function handle(delta) {
var time = 1500;
var easing = 'easeInOutExpo';
var distance = document.getElementById('Element').scrollHeight;

$('html, body').stop().animate({
    scrollTop: $(window).scrollTop() - (distance * delta)
}, time, easing );
}
/** Event handler for mouse wheel event.
*/
function wheel(event){
    var delta = 0;
    if (!event) /* For IE. */
            event = window.event;
    if (event.wheelDelta) { /* IE/Opera. */
            delta = event.wheelDelta/120;
    } else if (event.detail) { /** Mozilla case. */
            /** In Mozilla, sign of delta is different than in IE.
             * Also, delta is multiple of 3.
             */
            delta = -event.detail/3;
    }
    /** If delta is nonzero, handle it.
     * Basically, delta is now positive if wheel was scrolled up,
     * and negative, if wheel was scrolled down.
     */
    if (delta)
            handle(delta);
    /** Prevent default actions caused by mouse wheel.
     * That might be ugly, but we handle scrolls somehow
     * anyway, so don't bother here..
     */
    if (event.preventDefault)
            event.preventDefault();
event.returnValue = false;
}

/** Initialization code. 
* If you use your own event management code, change it as required.
*/
if (window.addEventListener)
    /** DOMMouseScroll is for mozilla. */
    window.addEventListener('DOMMouseScroll', wheel, false);
/** IE/Opera. */
window.onmousewheel = document.onmousewheel = wheel;

要获得距离，有两种选择： 1.手动给出一个值 2.通过定义“元素”

自动通过css

希望有所帮助。