function displaySearchElement(id, pfeil) {
  if (document.getElementById(id).style.display != "none") {
    document.getElementById(id).style.display="none";
	document.getElementById(pfeil).src = "/resource/image/pfeil_zu_hellblau.gif";
  } else {
    document.getElementById(id).style.display="block";
	document.getElementById(pfeil).src = "/resource/image/pfeil_auf_hellblau.gif";
  }
}