var entries = new Array("verschwinarbeit", "verschwinveran", "verschwinheimat", "verschwinkeramik");

function buttonarbeitsbereiche(){
	opentree(entries[0]); 
}

function buttonveranstaltung(){
	opentree(entries[1]); 
}

function buttonheimatmuseum(){
  opentree(entries[2]); 
}

function buttonkeramikflohmarkt(){
  opentree(entries[3]); 
}

function opentree(elementname){
  for (i=0;i<entries.length;i++) 
  {
    if (entries[i] == elementname){
      elementshowhide(elementname,true);
/*    alert("entries true"  + '  ' + entries.length + '  ' + elementname + ' / ' + entries[0] + '  ' + entries[1] + '  ' + entries[2] + '  ' + entries[3]);  */
    } else {
      elementshowhide(entries[i],false);
/*    alert("entries false" + '  ' + entries.length + '  ' + elementname + ' / ' + entries[0] + '  ' + entries[1] + '  ' + entries[2] + '  ' + entries[3]);  */
    }
  }
}

function elementshowhide(elementname, show){
	var elem = document.getElementById(elementname); 
  if(show == true){
/*    alert("true show"  + '  ' + show)
      alert("true elem.style.display"   + '  ' + elem.style.display) 
      alert("true elem.style.color"     + '  ' + elem.style.color)      */
      elem.style.display = 'block';
  } else {
/*    alert("false show"  + '  ' + show)
      alert("false elem.style.display"  + '  ' + elem.style.display) 
      alert("false elem.style.color"    + '  ' + elem.style.color)      */
      elem.style.display='none'
  }
}