arr = new Array(
["http://www.shopoxfordpa.com/rotator2/kat1.jpg","http://www.flatkat.com/","Website Design and Hosting"],
["http://www.shopoxfordpa.com/rotator2/kat2.jpg","http://www.flatkat.com/","Website Design and Hosting"],
["http://www.shopoxfordpa.com/rotator2/kat3.jpg","http://www.flatkat.com/","Website Design and Hosting"], 
["http://www.shopoxfordpa.com/rotator2/kat4.jpg","http://www.flatkat.com/","Website Design and Hosting"],
["http://www.shopoxfordpa.com/rotator2/kat5.jpg","http://www.flatkat.com/","Website Design and Hosting"],
["http://www.shopoxfordpa.com/rotator2/kat6.jpg","http://www.flatkat.com/","Website Design and Hosting"]

// no comma at the end of last index 
);
var lastImg="0"; 

function changeimg()
{   var randNum = getRand();  
document.getElementById("img").src = arr[randNum][0]; 
document.getElementById("link").href = arr[randNum][1]; 
document.getElementById("img").title = arr[randNum][2]; 
setTimeout('changeimg()',20000);  }  
function getRand () {   var rnum;   
var id=Math.round(Math.random()*(arr.length-1));   
rnum = id;   if (rnum==lastImg) { rnum = getRand(); }   
lastImg=rnum;   return rnum;  }