function switchImage(imgName, imgSrc) 
{
  if (document.images)
  {
	if (imgSrc != "none")
	{
	  document.images[imgName].src = imgSrc;
	}
  }
}
	
	
function simplePreload()
{ 
  var args = simplePreload.arguments;
  document.imageArray = new Array(args.length);
  for(var i=0; i<args.length; i++)
  {
	document.imageArray[i] = new Image;
	document.imageArray[i].src = args[i];
  }	
}