var scrollFunc = function(e) {
    e = e || window.event;
    if (e.wheelDelta) { //判斷瀏覽器IE，谷歌滑輪事件               
        if (e.wheelDelta > 0) { //當(dāng)滑輪向上滾動時  
            console.log("滑輪向上滾動");
        }
        if (e.wheelDelta < 0) { //當(dāng)滑輪向下滾動時  
            console.log("滑輪向下滾動");
        }
    } else if (e.detail) { //Firefox滑輪事件  
        if (e.detail > 0) { //當(dāng)滑輪向上滾動時  
            console.log("滑輪向上滾動");
        }
        if (e.detail < 0) { //當(dāng)滑輪向下滾動時  
            console.log("滑輪向下滾動");
        }
    }
}
//給頁面綁定滑輪滾動事件  
if (document.addEventListener) { //firefox  
    document.addEventListener('DOMMouseScroll', scrollFunc, false);
}
//滾動滑輪觸發(fā)scrollFunc方法  //ie 谷歌  
window.onmousewheel = document.onmousewheel = scrollFunc;