今天尝试写基于jquery的滚动条，遇到了滚轮事件的兼容性问题，在firefox下和在IE下以及其它浏览器下，监听的事件有区别，查了下相关资料总结一下不同浏览器下鼠标滚轮事件兼容性的处理方式：
在 firefox 下 需要监听 DOMMouseScroll,即：
if(window.addEventListener){
/**DOMMouseScrollisformozilla.*/
window.addEventListener('DOMMouseScroll',wheel,false);
}
在IE或其它浏览器下，这样添加监听就可以了：
window.onmousewheel=document.onmousewheel=wheel;
/**
*CreatedbyAdministratoron/7/15.
*/
/**Eventhandlerformousewheelevent.
*鼠标滚动事件
*/
$(function(){
varwheel=function(event){
vardelta=0;
if(!event)/*ForIE.*/
event=window.event;
if(event.wheelDelta){/*IE/Opera.*/
delta=event.wheelDelta/120;
}elseif(event.detail){
/**Mozillacase.*/
/**InMozilla,signofdeltaisdifferentthaninIE.
*Also,deltaismultipleof3.
*/
delta=-event.detail/3;
}
/**Ifdeltaisnonzero,handleit.
*Basically,deltaisnowpositiveifwheelwasscrolledup,
*andnegative,ifwheelwasscrolleddown.
*/
if(delta)
handle(delta);
/**Preventdefaultactionscausedbymousewheel.
*Thatmightbeugly,butwehandlescrollssomehow
*anyway,sodon'tbotherhere..
*/
if(event.preventDefault)
event.preventDefault();
event.returnValue=false;
}
/**Initializationcode.
*Ifyouuseyourowneventmanagementcode,changeitasrequired.
*/
if(window.addEventListener){
/**DOMMouseScrollisformozilla.*/
window.addEventListener('DOMMouseScroll',wheel,false);
}
/**IE/Opera.*/
window.onmousewheel=document.onmousewheel=wheel;
/**Thisishigh-levelfunction.
*Itmustreacttodeltabeingmore/lessthanzero.
*/
varhandle=function(delta){
varrandom_num=Math.floor((Math.random()*100)+50);
if(delta
//alert("鼠标滑轮向下滚动："+delta+"次！");//1
$("#mScroll").val("鼠标滑轮向下滚动："+delta+"次！");
return;
}else{
//alert("鼠标滑轮向上滚动："+delta+"次！");//-1
$("#mScroll").val("鼠标滑轮向上滚动："+delta+"次！");
return;
}
}
})
