function ad1() {
   
   var browserName=navigator.appName;    
   var ads =   document.getElementById("ads");
   var whichad= Math.floor(Math.random()*1);
   var ad=new Array(1)
   ad[0]="<IMG border='0' alt='Ask Obout Our Free Internet Advertising Opportunity' src='images/ad7.jpg'>";

   var wipe=new Array(8)
   wipe[0]="revealTrans(Duration=1.0, Transition=1)";
   wipe[1]="revealTrans(Duration=1.0, Transition=2)";
   wipe[2]="revealTrans(Duration=1.0, Transition=3)";
   wipe[3]="revealTrans(Duration=1.0, Transition=4)";
   wipe[4]="revealTrans(Duration=1.0, Transition=5)";
   wipe[5]="revealTrans(Duration=1.0, Transition=6)";
   wipe[6]="revealTrans(Duration=1.0, Transition=7)";
   wipe[7]="revealTrans(Duration=1.0, Transition=8)";

if (browserName=="Microsoft Internet Explorer")
 {
   ads.style.filter=wipe[whichad];
   ads.filters[0].Apply(); 
   ads.innerHTML=(ad[whichad]);
   ads.filters[0].Play();
   setTimeout("ad1()",4000);
   
}
else
{
   document.getElementById("ads").innerHTML=(ad[whichad])
   setTimeout("ad1()",4000);
}
}