function tr(id,color) {
	document.getElementById(id).className = color;
}

zurueck_over = new Image();
zurueck_over.src = "../../image/design/zurueck_over.gif";
zurueck_out = new Image();
zurueck_out.src = "../../image/design/zurueck.gif";

nach_oben_over = new Image();
nach_oben_over.src = "../../image/design/nach_oben_over.gif";
nach_oben_out = new Image();
nach_oben_out.src = "../../image/design/nach_oben.gif";

portrait_over = new Image();
portrait_over.src = "../../image/design/nav_portrait_over.gif";
portrait_out = new Image();
portrait_out.src = "../../image/design/nav_portrait.gif";

impressum_over = new Image();
impressum_over.src = "../../image/design/nav_impressum_over.gif";
impressum_out = new Image();
impressum_out.src = "../../image/design/nav_impressum.gif";

kontakt_over = new Image();
kontakt_over.src = "../../image/design/nav_kontakt_over.gif";
kontakt_out = new Image();
kontakt_out.src = "../../image/design/nav_kontakt.gif";

home_over = new Image();
home_over.src = "../../image/design/nav_home_over.gif";
home_out = new Image();
home_out.src = "../../image/design/nav_home.gif";

newsletter_over = new Image();
newsletter_over.src = "../../image/design/nav_newsletter_over.gif";
newsletter_out = new Image();
newsletter_out.src = "../../image/design/nav_newsletter.gif";

links_over = new Image();
links_over.src = "../../image/design/nav_links_over.gif";
links_out = new Image();
links_out.src = "../../image/design/nav_links.gif";