/*IE注冊事件*/
if(document.attachEvent){
document.attachEvent('onmousewheel',scrollFunc);
}

/*Firefox注冊事件*/
if(document.addEventListener){
document.addEventListener('DOMMouseScroll',scrollFunc,false);
}

/*注冊事件*/
if(document.addEventListener){
document.addEventListener('DOMMouseScroll',scrollFunc,false);
}//W3C
window.onmousewheel=document.onmousewheel=scrollFunc;//IE/Opera/Chrome

<p><label for="wheelDelta"> 滾動值:</label>(IE/Opera)<input type="text" id="wheelDelta" /></p>
<p><label for="detail"> 滾動值:(Firefox)</label><input type="text" id="detail" /></p>
<script type="text/javascript">
var oTxt=document.getElementById("txt");
/***********************
* 函數：判斷滾輪滾動方向
* 作者：walkingp
* 參數：event
* 返回：滾輪方向 1：向上 -1：向下
*************************/
var scrollFunc=function(e){
var direct=0;
e=e || window.event;

var t1=document.getElementById("wheelDelta");
var t2=document.getElementById("detail");
if(e.wheelDelta){//IE/Opera/Chrome
t1.value=e.wheelDelta;
}else if(e.detail){//Firefox
t2.value=e.detail;
}
ScrollText(direct);
}
/*注冊事件*/
if(document.addEventListener){
document.addEventListener('DOMMouseScroll',scrollFunc,false);
}//W3C
window.onmousewheel=document.onmousewheel=scrollFunc;//IE/Opera/Chrome/Safari </script>