function showItem(item, selectedColor){
  var count = 1;
  var id = 'sectionItemContent_' + count;
  while(getElement(id)){
    id = 'sectionItemContent_' + count; 
    titleID = 'sectionItemTitle_' + count;
    if(count == item){ 
      mostra(id);
      setColor(titleID, '', selectedColor);
    } else {
      nascondi(id);
      setColor(titleID, '', '#fff');
    }
    count++;
  }
}