var nav1off = new Image();
		nav1off.src = './gfx/background_off.gif';
		var nav1on = new Image();
		nav1on.src = './gfx/background_on.gif';

		var nav2off = new Image();
		nav2off.src = 'gfx/bands_off.gif';
		var nav2on = new Image();
		nav2on.src = 'gfx/bands_on.gif';

		var nav3off = new Image();
		nav3off.src = 'gfx/studies_off.gif';
		var nav3on = new Image();
		nav3on.src = 'gfx/studies_on.gif';

		var nav4off = new Image();
		nav4off.src = 'gfx/influences_off.gif';
		var nav4on = new Image();
		nav4on.src = 'gfx/influences_on.gif';
		
		var nav5off = new Image();
		nav5off.src = 'gfx/projects_off.gif';
		var nav5on = new Image();
		nav5on.src = 'gfx/projects_on.gif';

		function changeImg2(num, on) {
			var name = "nav" + num;
			document.images[name].src = eval(name+on+".src");
		}