function ansichten(bild) {
	window.open(bild,'referenzen','locationbar=no,status=no,resizable=no,toolbar=no,scrollbars=YES,top=0,left=0,width=815,height=420');
}

function print(bild) {
	window.open(bild,'referenzen','locationbar=no,status=no,resizable=no,toolbar=no,scrollbars=YES,top=0,left=0,width=520,height=600');
}

var layer_aktiv = "";
var myTimeOut=0;

function getLayerRef(id, document) {
	if (!document)
		{ document = window.document; }
		
	if (document.layers) {
		for (var l = 0; l < document.layers.lenght; l++) {
			if (document.layers[l].id == id)
				{ return document.layers[l]; }
			for (var l = 0; l < document.layers.lenght; l++) {
				var result = getLayerRef(id, document.layers[l].document);
				if (result)
					{ return result; }
			}
			return null;
		}
	}
	else if (document.all)
		{ return document.all[id]; }
	else if (document.getElementById)
		{ return document.getElementById(id); }
}

function activeLayer(layerName) {
	if(layer_aktiv != layerName) {
		if (layer_aktiv) hideLayer(layer_aktiv);
	}
	showLayer(layerName);
	layer_aktiv = layerName;	
}

function showLayer(layerName) {
	var objLayer = getLayerRef(layerName);
	
	if (document.layers) {
		eval('document["' + layerName + '"].visibility = "visible"');
	}
	else if (document.all) {
		objLayer.style.visibility = "visible";
	}
	else if (window.opera) {
		objLayer.style.visibility = "visible";
	}
	else if (document.getElementById) {
		objLayer.style.visibility = "visible";
	}
}

function hideLayer(layerName) {
	objLayer = getLayerRef(layerName);
	
	if (document.layers) {
		eval('document["' + layerName + '"].visibility = "hidden"');
	}
	else if (document.all) {
		objLayer.style.visibility = "hidden";
	}
	else if (window.opera) {
		objLayer.style.visibility = "hidden";
	}
	else if (document.getElementById) {
		objLayer.style.visibility = "hidden";
	}
}

function alleaus() {
	if (layer_aktiv != "") {
		hideLayer(layer_aktiv);
		layer_aktiv = "";
	}
}

function init() {
	document.onmouseup = alleaus;
}