function switchImage(ImageName, ImageSrc) {
	window.document.images[ImageName].src = ImageSrc;
	}
	
function openWin(URL, winName) {
  if (window.Fenster && !Fenster.closed) {
    Fenster.focus();
	return true; }
  Fenster = window.open(URL, winName, "left=100,top=100,width=640,height=550");
  }
  
  
 
function showLayer(ID)  {
	
	var Element = document.getElementById('Legend_'+ID);
	if (!Element) { return false; }
	var posElement = document.getElementById("LegendCell");
	var leftPos = 0;
	while (true) {
		if (posElement.parentNode.tagName == "BODY") { break; }
		// alert(posElement.tagName);
		var leftValue = new Number(posElement.offsetLeft);
		// alert(leftValue);
		if (leftValue) {
			leftPos += leftValue; }
		posElement = posElement.parentNode;
		}
	if (navigator.appName == "Netscape") { leftPos -= leftValue; }
	leftPos = leftPos+40;
	Element.style.left = leftPos + "px";
	Element.style.visibility = "visible";
	}

function hideLayer(ID)  {
	var Element = document.getElementById('Legend_'+ID);
	if (!Element) { return false; }
	Element.style.visibility = "hidden";
	}