<!--

if (document.images != null)

{       var currentImg = "nothing"

        preLoad();

}

function preLoad()

{       

        nav1_up = new Image(130,15);

        nav1_dn = new Image(130,15);

        nav1_up.src = "images/navbutton-home.jpg";

        nav1_dn.src = "images/navbutton-home-on.jpg";

		
        nav2_up = new Image(130,15);

        nav2_dn = new Image(130,15);

        nav2_up.src = "images/navbutton-blockwall.jpg";

        nav2_dn.src = "images/navbutton-blockwall-on.jpg";

		
        nav3_up = new Image(130,15);

        nav3_dn = new Image(130,15);

        nav3_up.src = "images/navbutton-roof.jpg";

        nav3_dn.src = "images/navbutton-roof-on.jpg";

		
        nav4_up = new Image(130,15);

        nav4_dn = new Image(130,15);

        nav4_up.src = "images/navbutton-energy.jpg";

        nav4_dn.src = "images/navbutton-energy-on.jpg";

		
		nav5_up = new Image(130,15);

        nav5_dn = new Image(130,15);

        nav5_up.src = "images/navbutton-electrical.jpg";

        nav5_dn.src = "images/navbutton-electrical-on.jpg";

		
		nav6_up = new Image(130,15);

        nav6_dn = new Image(130,15);

        nav6_up.src = "images/navbutton-mechanical.jpg";

        nav6_dn.src = "images/navbutton-mechanical-on.jpg";	

		
        nav7_up = new Image(130,15);

        nav7_dn = new Image(130,15);

        nav7_up.src = "images/navbutton-links.jpg";

        nav7_dn.src = "images/navbutton-links-on.jpg";	

		
		nav8_up = new Image(130,15);

        nav8_dn = new Image(130,15);

        nav8_up.src = "images/navbutton-contact.jpg";

        nav8_dn.src = "images/navbutton-contact-on.jpg";	

		
		nav9_up = new Image(130,15);

        nav9_dn = new Image(130,15);

        nav9_up.src = "images/navbutton-moisture.jpg";

        nav9_dn.src = "images/navbutton-moisture-on.jpg";	

		
		nav10_up = new Image(130,15);

        nav10_dn = new Image(130,15);

        nav10_up.src = "images/navbutton-datacntr.jpg";

        nav10_dn.src = "images/navbutton-datacntr-on.jpg";	
		
		
		nav11_up = new Image(130,15);

        nav11_dn = new Image(130,15);

        nav11_up.src = "images/navbutton-about.jpg";

        nav11_dn.src = "images/navbutton-about-on.jpg";	

		                }


function rollover(img,what)

{

        if (document.images != null)

        {

                        if(what == "over")        

                                swapImg = eval(img + "_dn.src");

                        if(what == "out")

                                swapImg = eval(img + "_up.src");

                        document [img].src = swapImg;

        }


  }

 -->