监测鼠标滚轴动作

/*
*/
<label for="wheelDelta"> 滚动值:</label>(IE/Opera)<input id="wheelDelta" type="text" />

<label for="detail"> 滚动值:(Firefox)</label><input id="detail" type="text" />

<script type="text/javascript">
     var oTxt=document.getElementById("txt");
    /***********************
    * 函数：判断滚轮滚动方向
    * 作者：walkingp
    * 参数：event
    * 返回：滚轮方向 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);
    }
    /*注册事件*/
    if(document.addEventListener){
        document.addEventListener('DOMMouseScroll',scrollFunc,false);
    }//W3C
    document.onmousewheel=scrollFunc;//IE/Opera/Chrome/Safari
    </script>