function showBox(box,category) {
//  if (category == "1") var boxes = new Array('activities','travel','climate','pistes');
//  else var boxes = new Array('activities','travel','climate');

  if (category == "1") var boxes = new Array('activities','travel','pistes');
  else var boxes = new Array('activities','travel');


  for(var i = 0; i < boxes.length; i++) {
    document.getElementById("box_"+boxes[i]).style.visibility = "hidden";
    document.getElementById("box_"+boxes[i]).style.display = "none";
    document.getElementById("topic_"+boxes[i]).className = "";
  }
  document.getElementById("box_"+box).style.visibility = "visible";
  document.getElementById("box_"+box).style.display = "block";
  document.getElementById("topic_"+box).className = "active";
}