function ChiudiQuesto(ID){
      document.getElementById(ID).style.display='none';
}

function MostraQuesto(ID){
      document.getElementById(ID).style.display='';
}

function ChiudiTutto(prefix,iterations){
      for (i=1;i<=iterations;i++){
        ChiudiQuesto(prefix+i);
      }
}




function Eventi(ID){
  if (document.getElementById(ID).style.display=='') {
    document.getElementById(ID).style.display='none';
    document.getElementById(ID+'_icon').innerHTML='<img src="graphics/FolderClose.png" />';
    }
  else {
    document.getElementById(ID).style.display='';
    document.getElementById(ID+'_icon').innerHTML='<img src="graphics/FolderOpen.png" />';
    }
}