function initMenu(){
 var trTags=document.getElementsByTagName('tr');
 var setID_activated=0;
 for(var i=0;i<trTags.length-1;i++){
  if(trTags[i].id=="kategorier" || setID_activated>0) setID_activated++;
  if(setID_activated==1) trTags[i].className="divRemoved" 
  else if(setID_activated>2){
   if(trTags[i].innerHTML.indexOf("ffffff")>-1) trTags[i].className="divRemoved"
   else if(trTags[i].childNodes.length==1){
    trTags[i].childNodes[0].className="folder_title";
    trTags[i].className="folder_plus";
    trTags[i].cells[0].onclick=function(){
     this.parentNode.className = (this.parentNode.className=="folder_plus") ? "folder_minus":"folder_plus";
     var currentSibling=this.parentNode.nextSibling;
     while(! (currentSibling.className=="folder_plus" || currentSibling.className=="folder_minus")){
      if(currentSibling.className=="divHidden") currentSibling.className="divVisible"
      else if(currentSibling.className=="divVisible") currentSibling.className="divHidden";
      currentSibling=currentSibling.nextSibling;
     }
    }
   } else trTags[i].className="divHidden";
  }
 }
 var checkboxes=document.getElementsByName("layerID");
 for(var i=0;i<checkboxes.length;i++){
  checkboxes[i].onclick=function(){
   var checkboxes=document.getElementsByName("layerID");
   for(var j=0;j<checkboxes.length;j++){
    if(this.checked && checkboxes[j].value==this.value) checkboxes[j].checked=true
    else if(this.checked==false && checkboxes[j].value==this.value) checkboxes[j].checked=false;
   }
  }
 }
}