This article describes the method of JS to automatically block the div layer in 5 seconds. Share it for your reference. The specific implementation method is as follows:
Copy the code as follows: <html>
<head>
<title>JS implements automatic blocking of div layer in 5 seconds</title>
<style type="text/css">
<!--
#sponsorAdDiv {position:absolute; height:1; width:1; top:0; left:0;}
-->
</style>
</head>
<body>
<SCRIPT LANGUAGE="JavaScript1.2">
adTime=5; //The expected time of the window
chanceAd=1;
var ns=(document.layers);
var ie=(document.all);
var w3=(document.getElementById && !ie);
adCount=0;
function initAd(){
if(!ns && !ie && !w3) return;
if(ie) adDiv=eval('document.all.sponsorAdDiv.style');
else if(ns) adDiv=eval('document.layers["sponsorAdDiv"]');
else if(w3) adDiv=eval('document.getElementById("sponsorAdDiv").style');
randAd=Math.ceil(Math.random()*hanceAd);
if (ie||w3)
adDiv.visibility="visible";
else
adDiv.visibility ="show";
if(randAd==1) showAd();
}
function showAd(){
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;}
else if (ns){documentWidth=window.innerWidth/2+window.pageXOffset-20;
documentHeight=window.innerHeight/2+window.pageYOffset-20;}
else if (w3){documentWidth=self.innerWidth/2+window.pageXOffset-20;
documentHeight=self.innerHeight/2+window.pageYOffset-20;}
adDiv.left=documentWidth-200;adDiv.top =documentHeight-200;
setTimeout("showAd()",100);}else closeAd();
}
function closeAd(){
if (ie||w3)
adDiv.display="none";
else
adDiv.visibility ="hide";
}
onload=initAd;
</script>
<div id="sponsorAdDiv" style="visibility:hidden">
<table bgcolor="008000"><tr><td>
<table bgcolor="F0FFF0"><tr><td>
<center>welcome to www.CsrCode.cn!<BR><BR>This window will be automatically blocked in 5 seconds</center>
</td></tr></table></td></tr></table></div>
</body>
</html>
I hope this article will be helpful to everyone's JavaScript programming.