num_ads=3; // Number of ads in rotation

image0="/images/SERDC2010.gif";
link0="http://www.serdc.org/";
alt0="2010 SERDC";

image1="http://base.myecoville.com/images/rr_con.jpg";
link1="http://www.resource-recycling.com/rr_conference/";
alt1="Resource Recycling Conference";

image2="http://base.myecoville.com/images/cdconference";
link2="http://www.cdrecyclingconference.com/";
alt2="Southeast Construction & Demolition Recycling Conference";

today=new Date();
today=Math.round(today.getTime()/10);
rnd=today%num_ads;

// Edit the below for specific banner size
document.writeln('<a target="_new" href="'+eval("link"+rnd)+'" title="'+eval("alt"+rnd)+'" rel="external"><img src="'+eval("image"+rnd)+'" alt="'+eval("alt"+rnd)+'" width="180" border="none" /><br /></a>');