// Javascript Fehler unterdruecken
onerror = stopError;
	function stopError()
		{return true;}
		
// noerrors
function bo_noerrors(msg,file,line) { if("undefined" != typeof bo_pd_over) window.onerror = null;  return true; }
window.onerror = bo_noerrors;


function toggleLayer(whichLayer)
	{
	if (document.getElementById)
		{
		// this is the way the standards work
		var style2 = document.getElementById(whichLayer).style;
		style2.display = style2.display? "":"block";
		}
	else if (document.all)
		{
		// this is the way old msie versions work
		var style2 = document.all[whichLayer].style;
		style2.display = style2.display? "":"block";
		}
	else if (document.layers)
		{
		// this is the way nn4 works
		var style2 = document.layers[whichLayer].style;
		style2.display = style2.display? "":"block";
		}
	}