arr3 = new Array(
["http://www.petsandfriendsjv.com/images/homepage_ads/rotator3/canidae_alllifestages.jpg","http://www.petsandfriendsjv.com/dog_food_canidae_all_life_stages_dog_dry.asp","Canidae All Life Stages Dry"],
["http://www.petsandfriendsjv.com/images/homepage_ads/rotator3/chickensoup_adultdry.jpg","http://www.petsandfriendsjv.com/dog_food_chickensoup_adult_dry.asp","Chicken Soup for the Cat Lovers SoulAdult Dog Formula "],
["http://www.petsandfriendsjv.com/images/homepage_ads/rotator3/exclusive_reducedfat_chickenrice.jpg","http://www.petsandfriendsjv.com/dog_food_exclusive_adult_reducedfat_chickenrice.asp","Exclusive™ Reduced Fat Chicken & Rice Adult Formula"], 
["http://www.petsandfriendsjv.com/images/homepage_ads/rotator3/fromm_surfturf.jpg","http://www.petsandfriendsjv.com/cat_food_fromm_surfturf.asp","Fromm Surf & Turf"]
// no comma at the end of last index 
);
var lastImg="0"; 

function changeimg3()
{   var randNum = getRand();  
document.getElementById("img3").src = arr3[randNum][0]; 
document.getElementById("link3").href = arr3[randNum][1]; 
document.getElementById("img3").title = arr3[randNum][2]; 
setTimeout('changeimg3()',10000);  }  
function getRand () {   var rnum;   
var id=Math.round(Math.random()*(arr3.length-1));   
rnum = id;   if (rnum==lastImg) { rnum = getRand(); }   
lastImg=rnum;   return rnum;  }