That value (chanceAd=X;) only represents how likely the ad is to show. It has nothing to do with timing. Each page load, the ad will have a one in X chance of appearing. If it is set to 1, that is one chance in one, or all the time. If it is set to 2, the chance that the ad will show is 50% but, this is reset each page load, so the ad could appear several page loads in a row or not appear several in a row - over a long period of repeated page loads, it will appear about half of the time.
What you are asking for could be done using a cookie or cookies, perhaps combined with an onpage timer and/or flag. All that would depend upon just what you would want to have happen. The easiest is just to set one cookie on page unload. This cookie could be set to expire after five minutes and be set not to be reset unless it had expired. If the page were simply reloaded though (without navigating away first), even after the cookie expired, the ad would not be shown again, however, if the page were navigated away from and, before the page were returned to, the cookie expired, then the ad would show. A special circumstance would arise if the page were returned to before the cookie expired but reloaded after expiration, in this case, no ad would show.
Here is that version of things:
Code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css">
#sponsorAdDiv {position:absolute; height:1; width:1px; top:0; left:0;}
</style>
<script type="text/javascript">
/******************************************
* DHTML Ad Box (By Matt Gabbert at http://www.nolag.com)
* Visit http://www.dynamicdrive.com/ for full script
* This notice must stay intact for use
******************************************/
adTime=10; // seconds ad reminder is shown
chanceAd=1; // ad will be shown 1 in X times (put 1 for everytime)
var respite=5 // set to number of minutes add will not be shown under any circumstances
var ns=(document.layers);
var ie=(document.all);
var w3=(document.getElementById && !ie);
var calunit=ns? "" : "px"
adCount=0;
function initAd(){
if (readCookie('adtimer')=='adtimer')
return;
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()*chanceAd);
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 =truebody().offsetWidth/2+truebody().scrollLeft-20;
documentHeight =truebody().offsetHeight/2+truebody().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+calunit;adDiv.top =documentHeight-200+calunit;
setTimeout("showAd()",100);}else closeAd();
}
function closeAd(){
if (ie||w3)
adDiv.display="none";
else
adDiv.visibility ="hide";
}
function truebody(){
return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}
function createCookie(name,value,minutes)
{
if (minutes)
{
var date = new Date();
date.setTime(date.getTime()+(minutes*60*1000));
var expires = "; expires="+date.toGMTString();
}
else var expires = "";
document.cookie = name+"="+value+expires+"; path=/";
}
function readCookie(name)
{
var nameEQ = name + "=";
var ca = document.cookie.split(';');
for(var i=0;i < ca.length;i++)
{
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1,c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
}
return null;
}
onload=initAd;
onunload=function(){
if (readCookie('adtimer')=='adtimer')
return;
createCookie('adtimer', 'adtimer', respite)
}
</script>
</head>
<body>
<img src="../side/1st.jpg">
<div id="sponsorAdDiv" style="visibility:hidden">
<table width="450px" height="350px" bgcolor="#008000"><tr><td>
<table width="445px" height="345px" bgcolor="#F0FFF0"><tr><td align="center" valign="middle">
<!--*****EDIT THIS MESSAGE*****-->
<A HREF="http://www.amazon.com/exec/obidos/redirect-home/wa0c?tag-id=wa0c&placement=home-btn-100x70.gif&site=amazon">
<IMG SRC="http://www.associmg.com/assoc/us/home-btn-100x70.gif?tag-id=wa0c"></A><p><b>Please take time to show your support<br>
for this site by visiting one<br>
of our sponsors during this<br> brief intermission.</b>
</p>
<p><A HREF="http://www.amazon.com/exec/obidos/redirect-home/wa0c?tag-id=wa0c&placement=home-logo-130x60b.gif&site=amazon">
<IMG SRC="http://www.associmg.com/assoc/us/home-logo-130x60b.gif?tag-id=wa0c"></A></p>
<p>(This announcement will close shortly)
<br>
<!--*****EDIT THE ABOVE MESSAGE*****-->
</td></tr></table></td></tr></table>
</div>
</body>
</html>
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