var PreloadDone = false;

function SwapImage( ImgName, ImgSrc )
{
  if( document.images && ( PreloadDone == true ) )
  {
    document.images[ImgName].src = ImgSrc;
  }
}

function PreloadImages()
{
  if( document.images )
  {
    africa_hover = new Image();
    africa_hover.src = "/images/africa_hover.jpg";

    asia_hover = new Image();
    asia_hover.src = "/images/asia_hover.jpg";

    europe_hover = new Image();
    europe_hover.src = "/images/europe_hover.jpg";

    north_america_hover = new Image();
    north_america_hover.src = "/images/north_america_hover.jpg";
	
    oceania_hover = new Image();
    oceania_hover.src = "/images/oceania_hover.jpg";
	
    southcentralamerica_hover = new Image();
    southcentralamerica_hover.src = "/images/south_america_hover.jpg";
	
    
    PreloadDone = true;
  }
}