var NumberOfAds = 5; 
var now = new Date(); 
var sec = now.getSeconds(); 
var AdNumber = sec % NumberOfAds; 
AdNumber +=1; 

if (AdNumber==1) 
{ 
Graphic="Media/images3/image1.jpg"; 
width = "201"; 
height = "135"; 
} 

if (AdNumber==2) 
{ 
Graphic="Media/images3/image2.jpg"; 
width = "201"; 
height = "135";  
} 

if (AdNumber==3) 
{ 
Graphic="Media/images3/image3.jpg"; 
width = "201"; 
height = "135";  
} 

if (AdNumber==4) 
{ 
Graphic="Media/images3/image4.jpg"; 
width = "201"; 
height = "135";  
} 

if (AdNumber==5) 
{ 
Graphic="Media/images3/image5.jpg"; 
width = "201"; 
height = "135";  
} 

document.write('<img src=\"' + Graphic + '\" width='); 
document.write(width + ' height=' + height + ' '); 
document.write('border=0><br>');