var how_many_ads = 7;
var randomnumber = Math.random();
var ad = Math.round( (how_many_ads - 1) * randomnumber) + 1;
var ad_width="468";
var ad_height="60";
//var ad = Math.round(Math.random() * how_many_ads + 0.5);
//var now = new Date()
//var sec = now.getSeconds()
//var ad = sec % how_many_ads;
//ad +=1;
if (ad==1) {  //ongoing
url="http://www.sportbiketrackgear.com";  
alt="Sportbike Track Gear";
banner="http://stores.homestead.com/SportbikeTrackGear/catalog/NEWBANNER2.gif";
}
else if (ad==2) {  //ongoing
url="http://www.sportbiketrackgear.com";  
alt="Sportbike Track Gear";
banner="http://stores.homestead.com/SportbikeTrackGear/catalog/NEWBANNER.gif";
}
else if (ad==4) {  //from 3/6/09 through 2009
url="http://mizemotors.com/";  
alt="Mize Mobile";
banner="images/ad_images/banner_mizemobile_michelin.gif";
}
else if (ad==5) {  //from 3/6/09 through 2009
url="http://mizemotors.com/";
alt="Mize Mobile";
banner="images/ad_images/banner_mizemobile_bridgestone.gif";
}
//else if (ad==3) { 
//url="advertise.htm";
//alt="Advertise on the WERA BBS!";
//banner="images/ad_images/advertise2.gif";
//}
else if (ad==6) { //ongoing
url="http://www.yoyodyneti.com/";
alt="Yoyodyne";
banner="images/ad_images/banner_yoyodyne.gif";
}
else if (ad==3) { // from 9/29/2009 to 9/29/2010
url="http://www.dunlopracing.com/specials-09.html";
alt="Dunlop Race Tire Service";
banner="images/ad_images/banner_dunlop.jpg";
}
else if (ad==7) { // from 11/4/2009 to 2/4/2010
url="http://www.hondaeasttoledo.com";
alt="Honda East Toledo";
banner="http://hondaeasttoledo.info/wera/werabanner.gif";
}
else {
url="advertise.htm";
alt="Advertise on the WERA BBS!";
banner="images/ad_images/advertise2.gif";
}

document.write('<a href=\"' + url + '\" target=\"_blank\">');
document.write('<img src=\"' + banner + '\" width=')
document.write(ad_width + ' height=' + ad_height + ' ');
document.write('alt=\"' + alt + '\" border=0></a><br>');
//document.write('<input type=\"hidden\" name=\"ad\" value=\"' + ad + '\">');