function closeLayer() {
	document.getElementById('kampagneBox').style.display = 'none';
	document.getElementById('overdub').style.display = 'none';
	document.body.style.overflow="";
}

function switchlayer(lFile) {
	
	//alert(lFile);
	
	// erstellen des requests
	var req = null;
	
	if(window.XMLHttpRequest && !(window.ActiveXObject)) {
		try {
			req = new XMLHttpRequest();
		} catch(e) {
			req = false;
		}
	// branch for IE/Windows ActiveX version
	} else if(window.ActiveXObject) {
		try {
			req = new ActiveXObject("Msxml2.XMLHTTP");
		} catch(e) {
			try {
				req = new ActiveXObject("Microsoft.XMLHTTP");
			} catch(e) {
				req = false;
			}
		}
	}
	
	
	if(req == null) {
		alert("Error creating request");
	}
	
	req.open("GET", 'http://www.redcross.ch/data/kampagnen/de/'+lFile, true);
	
	req.onreadystatechange = function() {
		switch(req.readyState) {
			 case 4:
				if(req.status!=200) {
					alert("Fehler:"+req.status);
				} else {
					//alert(req.responseText);
					document.getElementById('kampagneBox').innerHTML = req.responseText;
					document.getElementById('kampagneBox').innerHTML = req.responseText;
				}
			 break;
			 
			 default:
				return false;
			break;
		}
	};
	
	req.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
	req.send(null);
}