<script type="text/javascript">

var scrollFunc=function(e){

e=e || window.event;

if(e.wheelDelta){//IE/Opera/Chrome

if(e.wheelDelta==120)

{

//向上滚动事件

alert(e.wheelDeta +"向上"); 

}else

{

//向上滚动事件

alert(e.wheelDeta +"向上");

}

}else if(e.detail){

//Firefox

if(e.detail==-3) {

//向上滚动事件<br>

alert(e.detail +"向上");

}else {

//向下滚动事件<br>

alert(e.detail +"向下 ");

}

}

};

if(document.addEventListener){

//adding the event listerner for Mozilla

document.addEventListener("DOMMouseScroll" ,scrollFunc, false);

}

//IE/Opera/Chrome

window.onmousewheel=document.onmousewheel=scrollFunc;

</script>