function displayItem(s) {
  var obj = document.getElementById(s);
//  obj.style.display = "block";
//  obj.style.visibility = "visible";

}
function nodisplayItem() {

  for (var i = 1; i < 11; i++) {
    var obj = document.getElementById("sub" + i);
//    obj.style.display = "none";
//    obj.style.visibility = "hidden";
  }
}