注意是用到了,下列的演示
<ScriptLanguage =“ JavaScript” type =“ text/javascript”>
adtime = 8;
chancead = 1;
varns =(document.layers);
varie =(document.all);
varw3 =(document.getElementById &&!ie);
adcount = 0;
FunctionInitad(){
如果(!ns &&!ie &&!w3)返回;
if(ie)addiv = eval('document.all.sponsoraddiv.style');
elseif(ns)addiv = eval('document.layers [“ sponsorAddiv”]');
elseif(w3)addiv = eval('document.getElementById(“ sponsorAddiv”)。样式');
randad = math.ceil(Math.random()*chancead);
如果(即|| W3)
addiv.visibility =“可见”;
别的
addiv.visibility =“ show”;
如果(randad == 1)showad();
}
functionshowad(){
if(adcount <adtime*10){adcount+= 1;
if(ie){documentWidth = document.body.offsetWidth/2+document.body.scrollleft-20;
documentheight = document.body.body.offsetheight/2+document.body.scrolltop-20;}
elseif(ns){documentWidth = window.innerwidth/2+window.pagexoffset-20;
documentheight = window.innerheight/2+window.pageyoffset-20;}
elseif(w3){documentWidth = self.innerwidth/2+window.pagexoffset-20;
documentHeight = self.innerheight/2+window.pageyOffset-20;}
addiv.left = documentWidth-100; addiv.top = documentHeight-0;
settimeout(“ showad()”,100);}
}
functionClosead(){
如果(即|| W3)
addiv.display =“无”;
别的
addiv.visibility =“ hide”;
}
功能$(obj){
returnDocument.getElementById(obj);
}
functionCheckform(){
if($(“ file1”)。value!=“”)
{
if(/jpg| jpeg| gif| bmp/i.test($(“ file1”)。value.match(//.(/w+)$/)$/)[0])== false){
警报(“您只能上传图片文件”);