var currentID = 0;
function libObj(obj){
  if(!document.getElementById && !document.all)return false;
  return document.getElementById?document.getElementById(obj):document.all?document.body.all[name]:0;
}
function visibility(obj){
  return obj.style.visibility;
}
function hidden(obj){
  obj.style.visibility='hidden';
}
function visible(obj){
  obj.style.visibility='visible';
}
function hideID(id){
  if(currentID==id)return;
  var obj =libObj(id);
  if(!obj)return;
  return hidden(obj);
}
function showID(id){
  if(currentID==id)return;
  var obj =libObj(id);
  if(!obj)return;
  return visible(obj);
}
function setCurrentID(id){
  showID(id);
  currentID = id;

}