nav_1_over = new Image();
		nav_1_out = new Image();
		
		nav_2_over = new Image();
		nav_2_out = new Image();
		
		nav_3_over = new Image();
		nav_3_out = new Image();
		
		nav_4_over = new Image();
		nav_4_out = new Image();

        nav_1_over.src = "http://www.stefanwirtz.com/00_darstellung/img/navigation_home_1.gif";
		nav_1_out.src = "http://www.stefanwirtz.com/00_darstellung/img/navigation_home_0.gif";
		
		nav_2_over.src = "http://www.stefanwirtz.com/00_darstellung/img/navigation_vita_1.gif";
		nav_2_out.src = "http://www.stefanwirtz.com/00_darstellung/img/navigation_vita_0.gif";
		
		nav_3_over.src = "http://www.stefanwirtz.com/00_darstellung/img/navigation_schaukasten_1.gif";
		nav_3_out.src = "http://www.stefanwirtz.com/00_darstellung/img/navigation_schaukasten_0.gif";
		
		nav_4_over.src = "http://www.stefanwirtz.com/00_darstellung/img/navigation_kontakt_1.gif";
		nav_4_out.src = "http://www.stefanwirtz.com/00_darstellung/img/navigation_kontakt_0.gif";
		
// onmouseover="self.document.nav_1.src=nav_1_over.src;" onmouseout="self.document.nav_1.src=nav_1_out.src;"