function Aus(nr)
	{
	if (navigator.appName=="Netscape" && parseInt(navigator.appVersion) >= 5) 
		{
		zeile = 'feld'+nr+'.style.visibility = "hidden"';
		eval(zeile);
		}
	else if (parseInt(navigator.appVersion) >= 4) 
		{
		if(document.layers)
			{ document.layers["feld"+nr].visibility = "hide"; return; }
		else
			{ document.all["feld"+nr].style.visibility = "hidden"; return; }
		}
	}


function Ein(nr)
	{
	if (navigator.appName=="Netscape" && parseInt(navigator.appVersion) >= 5) 
		{
		zeile = 'feld'+nr+'.style.visibility = "visible"';
		eval(zeile);
		}
	else if (parseInt(navigator.appVersion) >= 4) 
		{
		if(document.layers)
			{ document.layers["feld"+nr].visibility = "show"; return; }
		else
			{ document.all["feld"+nr].style.visibility = "visible"; return; }
		}
	}
	
	

function lay(nr, xPos, yPos)
	{
	if (parseInt(navigator.appVersion) >= 4) 
		{
		if(navigator.appName=="Netscape")
			{ var wi=innerWidth/2; var hi = 0;} 
		else 	{ var wi=document.body.offsetWidth/2; var hi = 8;}

		xPos = xPos + wi;
		yPos = yPos + hi;

		if (navigator.appName=="Netscape" && parseInt(navigator.appVersion) >= 5) 
			{
			zeile = 'feld'+nr+' = document.getElementById("feld"+'+nr+')';
			eval(zeile);
			zeile = 'feld'+nr+'.style.position = "absolute"';
			eval(zeile);
			zeile = 'feld'+nr+'.style.left = '+(xPos+20);
			eval(zeile);
			zeile = 'feld'+nr+'.style.top = '+(yPos+10);
			eval(zeile);
			Aus(nr);
			}
		else if(document.layers)
			{
			document.layers["feld"+nr].left=xPos;
			document.layers["feld"+nr].top=yPos;
			}
		else
			{
			document.all["feld"+nr].style.left=xPos;
			document.all["feld"+nr].style.top=yPos;
			}
		Aus(nr);
		}
	}