function open_popup(url,popwidth,popheight) {
  var popup;
  popup = window.open(url,'survey',"toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,left=0,top=0,width="+popwidth+",height="+popheight);
}

function toggledisplay (id, indicator){
	if (document.getElementById) {
		var obj = document.getElementById(id);
		var indi = document.getElementById(indicator);
		obj.style.display = (obj.style.display=='block'?'none':'block');
		indi.innerHTML = (obj.style.display=='block'?'weniger info V':'mehr info >');
	} else if(document.all) { // IE
		id.style.display = (id.style.display=='block'?'none':'block');
		indi.innerHTML = (id.style.display=='block'?'weniger info V':'mehr info >');
	} else if (document.layers) { // Netscape 4.x
		document.id.style.display = (document.id.style.display=='block'?'none':'block');
		document["indicator"].document.open();
		if (document.id.style.display=='block')
		    document["indicator"].document.write('weniger info V');
		if (document.id.style.display!='block')
		    document["indicator"].document.write('mehr info >');
		document["indicator"].document.close();
	}
}

// Funktion zum Auslesen von URL-Parametern
function BekommeWert(a) {
res = '';
 s = location.search;
 if(s.indexOf('?') != -1){s = s.substring(1,s.length)}
 while(s != '')
 {
  b = s.substring(0,s.indexOf('='));
  c = s.substring(s.indexOf('=')+1,s.indexOf('&'));
  if(s.indexOf('&') == -1)
  {c = s.substring(s.indexOf('=')+1,s.length);}

  if(b == a){res = c; break;}
  if(s.indexOf('&') == -1){s = '';}
  else{s = s.substring(s.indexOf('&')+1,s.length)}
 }
 return unescape(res);
}