function swapImg(id, src){
	var object = getObj(id);
	object.src = src;
	return true;	
}

function getObj(name){
  if (document.getElementById){
  	return document.getElementById(name);	
  }
  else if (document.all){
	return document.all[name];
  }
  else if (document.layers){
   	return document.layers[name];
  }
  return false;
}