if (document.images) {

	aon = new Image();           // Active images
	aon.src = "images/nav1.jpg";
	aoff = new Image();          // Inactive images
	aoff.src = "images/nav1-on.jpg";

	bon = new Image();           // Active images
	bon.src = "images/nav3.jpg";
	boff = new Image();          // Inactive images
	boff.src = "images/nav3-on.jpg";

	con = new Image();           // Active images
	con.src = "images/nav5.jpg";
	coff = new Image();          // Inactive images
	coff.src = "images/nav5-on.jpg";

	don = new Image();           // Active images
	don.src = "images/nav7.jpg";
	doff = new Image();          // Inactive images
	doff.src = "images/nav7-on.jpg";

	eon = new Image();           // Active images
	eon.src = "images/nav9.jpg";
	eoff = new Image();          // Inactive images
	eoff.src = "images/nav9-on.jpg";

	fon = new Image();           // Active images
	fon.src = "images/nav11.jpg";
	foff = new Image();          // Inactive images
	foff.src = "images/nav11-on.jpg";

	gon = new Image();           // Active images
	gon.src = "images/nav13.jpg";
	goff = new Image();          // Inactive images
	goff.src = "images/nav13-on.jpg";




	
}


    
function imgOn(imgName) {
            if (document.images) {
                document[imgName].src = eval(imgName + "off.src");
            }
    }
    function imgOff(imgName) {
            if (document.images) {
                document[imgName].src = eval(imgName + "on.src");        
            }
    }