function IncludeZoomButtonImages(pathPrefix)
{
if (document.images)
{
   ZoomIn_Active = new Image();
   ZoomIn_Active.src = pathPrefix + "images/zoom_buttons/zoom_in_on.jpg";

   ZoomIn = new Image();
   ZoomIn.src = pathPrefix +  "images/zoom_buttons/zoom_in.jpg";
   
   ZoomOut_Active = new Image();
   ZoomOut_Active.src = pathPrefix +  "images/zoom_buttons/zoom_out_on.jpg";

   ZoomOut = new Image();
   ZoomOut.src = pathPrefix +  "images/zoom_buttons/zoom_out.jpg";   
}
}