if (document.images) {
	nav1 = new Image;	nav1a = new Image;	nav1b = new Image;
	nav2 = new Image;	nav2a = new Image;	nav2b = new Image;
	nav3 = new Image;	nav3a = new Image;	nav3b = new Image;
	nav4 = new Image;	nav4a = new Image;	nav4b = new Image;
	nav5 = new Image;	nav5a = new Image;	nav5b = new Image;
	nav6 = new Image;	nav6a = new Image;	nav6b = new Image;

	nav1.src = "gfx/nav1.jpg";	nav1a.src = "gfx/nav1a.jpg";	nav1b.src = "gfx/nav1b.jpg";
	nav2.src = "gfx/nav2.jpg";	nav2a.src = "gfx/nav2a.jpg";	nav2b.src = "gfx/nav2b.jpg";
	nav3.src = "gfx/nav3.jpg";	nav3a.src = "gfx/nav3a.jpg";	nav3b.src = "gfx/nav3b.jpg";
	nav4.src = "gfx/nav4.jpg";	nav4a.src = "gfx/nav4a.jpg";	nav4b.src = "gfx/nav4b.jpg";
	nav5.src = "gfx/nav5.jpg";	nav5a.src = "gfx/nav5a.jpg";	nav5b.src = "gfx/nav5b.jpg";
	nav6.src = "gfx/nav6.jpg";	nav6a.src = "gfx/nav6a.jpg";	nav6b.src = "gfx/nav6b.jpg";


	}

function chgImg(imgField,newImg) {
	if (document.images) {
		document[imgField].src= eval(newImg + ".src")
	}
}