if (document.images) {
//main nav
	nav1 = new Image;	nav1a = new Image;
	nav2 = new Image;	nav2a = new Image;
	nav3 = new Image;	nav3a = new Image;
	nav4 = new Image;	nav4a = new Image;
	nav5 = new Image;	nav5a = new Image;
	nav6 = new Image;	nav6a = new Image;
	nav7 = new Image;	nav7a = new Image;
	nav8 = new Image;	nav8a = new Image;
	home = new Image;	homea = new Image;
	
	nav1.src = "gfx/nav1.gif"; nav1a.src = "gfx/nav1a.gif";
	nav2.src = "gfx/nav2.gif"; nav2a.src = "gfx/nav2a.gif";
	nav3.src = "gfx/nav3.gif"; nav3a.src = "gfx/nav3a.gif";
	nav4.src = "gfx/nav4.gif"; nav4a.src = "gfx/nav4a.gif";
	nav5.src = "gfx/nav5.gif"; nav5a.src = "gfx/nav5a.gif";
	nav6.src = "gfx/nav6.gif"; nav6a.src = "gfx/nav6a.gif";
	nav7.src = "gfx/nav7.gif"; nav7a.src = "gfx/nav7a.gif";
	nav8.src = "gfx/nav8.gif"; nav8a.src = "gfx/nav8a.gif";
	home.src = "gfx/home.gif"; homea.src = "gfx/homea.gif";

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