var returnValue = true, links = ["http://www.silvertrailgraphics.com/", "http://www.startedbyamouse.com/", "http://www.burnsland.com/store/", "http://www.burnsland.com/ads/radisson.html", "http://www.privatecarservice.net/", "http://www.fortwildernessrr.com/", "http://www.bjwrr.com/ontrack/"], imgs = ["http://www.burnsland.com/ads/silvertrail.jpg", "http://www.burnsland.com/images/sbam-2.gif", "http://www.burnsland.com/ads/burnslandstore.png", "http://www.burnsland.com/ads/465x60.jpg", "http://www.burnsland.com/ads/privatecarservice.png", "http://www.burnsland.com/ads/fortwildernessrr.png", "http://www.burnsland.com/ads/ontrack.png"], 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]+"\" target=_blank title=\"Go to "+links[rand]+"\"><img src=\""+imgs[rand]+"\" alt=\"Go to "+links[rand]+"\"></a>");
}