Step 1: Add the following script to the <HEAD> section of your page:

<style type="text/css">
<!--
#sponsorAdDiv {position:absolute; height:1; width:1; top:0; left:0;}
-->
</style>
<SCRIPT LANGUAGE="JavaScript1.2">

/*
DHTML Ad Box (By Matt Gabbert- tax@nolag.com, http://www.nolag.com)
Script featured on Dynamicdrive.com
For full source, TOS, and 100's more DHTML scripts, visit http://www.dynamicdrive.com
*/

adTime=10;  // seconds ad reminder is shown
chanceAd=1; // ad will be shown 1 in X times (put 1 for everytime)

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()*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  =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;
//End-->
</script>

Step 2: Insert the below HTML code to the BOTTOM of your page, right above the </BODY> tag itself:

<div id="sponsorAdDiv" style="visibility:hidden">
<table width="450" height="350" bgcolor="#008000"><tr><td>
<table width="445" height="345" bgcolor="#F0FFF0"><tr><td align="center" valign="middle">

<!--*****EDIT THIS MESSAGE*****-->
<a href="http://www.viewsource.dk">
<img src="http://www.viewsource.dk/images/viewsource46860.gif" border=0>
</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>(This announcement will close shortly)
<br>

<!--*****EDIT THE ABOVE MESSAGE*****-->
</td></tr></table></td></tr></table>
</div>