js 鼠标滚动

var oTxt=document.getElementById("txt");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);}//W3Cwindow.onmousewheel=document.onmousewheel=scrollFunc;//IE/Opera/Chrome