function loadImage(fileName)
{ newImage = new Image();
  newImage.src = fileName;
  return newImage;
}


 if (document.images)
  { 
	nav_home_low = loadImage(img_folder + "nav_home_low.gif");
    nav_home_hi = loadImage(img_folder + "nav_home_hi.gif");

	nav_technology_low = loadImage(img_folder + "nav_technology_low.gif");
    nav_technology_hi = loadImage(img_folder + "nav_technology_hi.gif");

	nav_single_low = loadImage(img_folder + "nav_single_low.gif");
    nav_single_hi = loadImage(img_folder + "nav_single_hi.gif");

	nav_source_low = loadImage(img_folder + "nav_source_low.gif");
    nav_source_hi = loadImage(img_folder + "nav_source_hi.gif");

	nav_powerride_low = loadImage(img_folder + "nav_powerride_low.gif");
    nav_powerride_hi = loadImage(img_folder + "nav_powerride_hi.gif");

	nav_ups_low = loadImage(img_folder + "nav_ups_low.gif");
    nav_ups_hi = loadImage(img_folder + "nav_ups_hi.gif");

	nav_contact_low = loadImage(img_folder + "nav_contact_low.gif");
    nav_contact_hi = loadImage(img_folder + "nav_contact_hi.gif");


	imagesLoaded = true;
  }




function Roll(id,fn)
{
   if ((document.images) && (imagesLoaded))
      if (id == "over")
      {
         document[fn].src = eval(fn + "_hi.src");
      }
      else if (id == "out")
      {
         document[fn].src = eval(fn + "_low.src");
      }
}



function PicRoll(id,fn)
{
   if ((document.images) && (homeLoaded))

	    var img = "";
	    
	    if ((fn == "single") || (fn == "power") || (fn == "front_logo"))
	    { img = "topoff";
	    }
	    
	    else if ((fn == "source") || (fn == "uninter"))
	    { img = "bottomoff";
	    }

	 
	    if (id == "over")
    	{ 
    	    document[img].src = eval(fn + "_hi.src");
		}

      	else if (id == "out")
      	{ 
      	    document[img].src = eval(img + "_low.src");
      	}

}



function openWin(fileIn)
{ window.open(fileIn,'popup','width=652,height=436,toolbar=no,status=no,scrollbars=no,resize=no,screenX=0,screenY=0,left=0,top=0');
}


function openPdfs(fileIn)
{ window.open(fileIn,'popup','width=650,height=500,toolbar=yes,status=no,scrollbars=yes,resize=yes,screenX=0,screenY=0,left=0,top=0');
}