var ind = 0;

function switchAd() {
if (ind>=adverts.length)
ind=0;
else if(ind<0)
ind=adverts.length-1

 getObj('adimage').src= adverts[ind]['img']
 getObj('adlink').href= adverts[ind]['link']

ind++
setTimeout("switchAd()",8000)
}

function getObj(i)
{
  if (document.getElementById) {
		return document.getElementById(i)
  } else if (document.all) {
		return document.all(i)
  } else if (document.layers) {
		return document.layers(i)
  }
}