阻止浏览器滚动条滚动

function handler(e){ //这里必须加参数e，否则firefox不兼容    e = e ? e : window.event;    if(document.addEventListener){        e.preventDefault();    }else{        e.returnValue = false;    }}var mousewheelevt=(/Firefox/i.test(navigator.userAgent))?"DOMMouseScroll": "mousewheel"//FF doesn‘t recognize mousewheel as of FF3.xif(document.attachEvent){//if IE (and Opera depending on user setting)    document.attachEvent("on"+mousewheelevt, handler);}else if(document.addEventListener){ //WC3 browsers    document.addEventListener(mousewheelevt, handler, false);}