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function flashBoxCtrl(o){
this.obj=document.getElementById(o);
//这个私有方法虽然写了，但暂时没用到
function addListener(ele,eventName,functionBody){
if (ele.attachEvent){
ele.attachEvent("on"+eventName, functionBody);
}else if (ele.addEventListener){
ele.addEventListener("on"+eventName,functionBody, false);
}else{
return false;
}
}
//初始化
this.init=function(){
var objImg=this.obj.getElementsByTagName("img");
var tagLength=objImg.length;
if (tagLength>0){
var oUl=document.createElement("ul");
oUl.setAttribute("id",o+"numTag");
for (var i=0;i=oTag.length-1?0:flag+1;
objImg[flag].style.display="block";
oTag[flag].className = "hover";
timeout = setTimeout(step,4000);
};
oTag[i].onmouseover=function(){
for (j=0;j
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