var returnValue = true;
var links = ["http://www.seworks.org/index.php ",
				"http://www.relayforlife.com/",
				"https://sites.google.com/a/ddouglas.k12.or.us/career-center/"];
			
var imgs = ["AdPages/RelocationPage/rotator2/SEWorks_b.jpg",
				"AdPages/AboutVisitors/rotator2/relay_b.jpg",
				"AdPages/AboutVisitors/rotator2/davdou_b.jpg"];
var len = (links.length + imgs.length) / 2;
if((len*2)%2 == 1){returnValue=false;}
function showAd(){
   if(returnValue==false)
         {document.write('<img src="blank.gif" alt="">');return false;}
   var rand = Math.floor(len*Math.random())
   document.write("<a href=\""+links[rand]+"\" title=\"Go to "+links[rand]+"\"><img src=\""+imgs[rand]+"\" alt=\"Go to "+links[rand]+"\"></a>");
}