var searchExtClosed = new Array( true );
function toggleExtSearch(id) {
  if( searchExtClosed[ id -1 ] ) {
    searchExtClosed[ id -1 ] = false;
    document.getElementById('searchtype_arrow_' + id).src = '../arrowUp.png';
    document.getElementById('searchtype_box_01').style.visibility='visible';
  } else {
    searchExtClosed[ id -1 ] = true;
    document.getElementById('searchtype_arrow_' + id).src = '../arrowDown.png';
    document.getElementById('searchtype_box_01').style.visibility='hidden';
  }
}
/* TODO: instead "type" search for checked item */
function chooseSearchtype(id,type) {
  toggleExtSearch( id );
  document.getElementById('searchtype_selected_' + id).firstChild.nodeValue=document.getElementsByName('searchtype')[type].value;
}