arr = new Array(
["http://www.clarkseeds.com/images/indexdirect/indexdirect1.jpg","http://www.clarkseeds.com/gardenseed.asp","Garden Seed"],
["http://www.clarkseeds.com/images/indexdirect/indexdirect2.jpg","http://www.clarkseeds.com/farmseed.asp","Farm Seed"], 
["http://www.clarkseeds.com/images/indexdirect/indexdirect3.jpg","http://www.clarkseeds.com/grassseed.asp","Grass Seed"],
["http://www.clarkseeds.com/images/indexdirect/indexdirect4.jpg","http://www.clarkseeds.com/wildlifeplot.asp","Wildlife Plot Seed"]

// 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;  }