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 () {
if (! ns &&! ie &&! w3) kembali;
if (yaitu) addiv = eval ('document.all.sponsoraddiv.style');
elseif (ns) addiv = eval ('document.layers ["sponsoraddiv"]');
elseif (w3) addiv = eval ('document.geteLementById ("sponsoraddiv"). style');
randad = math.ceil (math.random ()*chancead);
if (yaitu || w3)
addiv.visibility = "visible";
kalau tidak
addiv.visibility = "show";
if (randad == 1) showad ();
}
functionshowad () {
if (adcount <adtime*10) {adcount+= 1;
if (ie) {documentwidth = document.body.offsetWidth/2+document.body.scrollleft-20;
DocumentHeight = document.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 () {
if (yaitu || w3)
addiv.display = "none";
kalau tidak
addiv.visibility = "hide";
}
fungsi $ (obj) {
returnDocument.getElementById (OBJ);
}
functionCheckForm () {
if ($ ("file1"). value! = "")
{
if (/jpg|jpeg|gif|bmp/i.test ($ ("file1"). value.match (//.(/ w+) $/) [0]) == false) {
peringatan ("您只能上传图片文件");