function remove_class(){
  var annu_list = document.getElementById("thema_annu_list").getElementsByTagName("li");
  for (var i =0;i<annu_list.length;i++){
    var lilist=annu_list[i].getElementsByTagName("a");
    for (var k =0;k<lilist.length;k++){
      lilist[k].removeAttribute("class");
    }
  }
}

var annu_list = document.getElementById("thema_annu_list").getElementsByTagName("li");
for (var i =0;i<annu_list.length;i++){
  var lilist=annu_list[i].getElementsByTagName("a");
  for (var k =0;k<lilist.length;k++){
      lilist[k].onclick=function(){
        document.getElementById("infoSelect").style.display="none";
        remove_class();
        this.className="selected";
        var ulist =document.getElementById("dirRight").getElementsByTagName("ul");
        for (var l =0;l<ulist.length;l++){
            ulist[l].style.display="none";
        }
        if(document.getElementById(this.id.replace("link","list"))){
            document.getElementById(this.id.replace("link","list")).style.display="block";
            return false;
        }
      }
  }  
}