arr = new Array(
["http://www.petsandfriendsjv.com/images/homepage_ads/rotator1/exclusive_adult_chickenrice.jpg","http://www.petsandfriendsjv.com/dog_food_exclusive_adult_chickenrice.asp","Exclusive™ Chicken & Rice Adult Formula"],
["http://www.petsandfriendsjv.com/images/homepage_ads/rotator1/purina_catchow.jpg","http://www.petsandfriendsjv.com/cat_food_purina_catchow.asp","Purina Cat Chow Dry Cat Food"],
["http://www.petsandfriendsjv.com/images/homepage_ads/rotator1/naturesvariety_prairie_chickenrice.jpg","http://www.petsandfriendsjv.com/dog_food_naturesvariety_chickenrice.asp","Chicken Meal & Brown Rice Medley Prairie Kibble Diet for Dogs"], 
["http://www.petsandfriendsjv.com/images/homepage_ads/rotator1/solidgold_wolfking.jpg","http://www.petsandfriendsjv.com/dog_food_solidgold_wolfkingadultlb.asp","WolfKing Bison and Salmon Adult Formula TM - Large Breed"]
// 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()',10000);  }  
function getRand () {   var rnum;   
var id=Math.round(Math.random()*(arr.length-1));   
rnum = id;   if (rnum==lastImg) { rnum = getRand(); }   
lastImg=rnum;   return rnum;  }