//regelt den Rollover
function rollover(mode,bildname)
 {			
	if (mode == "h")
	{
	    document.images[bildname].src = "images/navi/" + bildname + "_h.gif";
	}

	if (mode == "n")
	{
		document.images[bildname].src = "images/navi/" + bildname + ".gif";
	}
}