var show_item = "opt_1";
  if (getCookie("show_item") != null) {
    show_item= "opt_" + getCookie("show_item");
  }
  document.getElementById(show_item).style.display = "block";
  var items = document.getElementsByClassName("title");
  for (var j=0; j<items.length; j++) {
   items[j].onclick = function() {
    var o = document.getElementById("opt_" + this.name);
    if (o.style.display != "block") {
     HideAll();
     o.style.display = "block";
     setCookie("show_item",this.name,1);
    }
    else {
     o.style.display = "none";
    }
   }
  }