function ov (bild) {
			top.navigation.document[bild].src = "../images/navigation/" + bild + "_a.gif";
		}

		function ou (bild) {
			var contentFrameSrc = "" + top.content.document.location.href;
			
			if (contentFrameSrc.indexOf(bild) == -1) {
				top.navigation.document[bild].src = "../images/navigation/" + bild + "_p.gif";
			}
		}
		
		function res (bild) {
			for (var i = 1; i <top.navigation.document.images.length; i++) {
				if (top.navigation.document.images[i].name.indexOf(bild)==-1) {
					top.navigation.document.images[i].src =  "../images/navigation/" + top.navigation.document.images[i].name + "_p.gif";
				} else {
					top.navigation.document.images[i].src = "../images/navigation/" + bild + "_a.gif";
				}
			}			
		}

		function actNav( id ) {
			if(typeof top.navigation.document != "undefined") {
				for(var i=1; i<=top.navigation.navnum; i++) {
					top.navigation.document.getElementById("nav"+i).className = top.navigation.document.getElementById("nav"+i).className.replace(/act$/,"");
				}
			
				// aktiv setzen
				top.navigation.document.getElementById("nav"+id).className = top.navigation.document.getElementById("nav"+id).className + "act";
			}
		}