function show_edit_area(id)
{
  var a_area = document.getElementById("a_area_" + id);
  var e_area = document.getElementById("e_area_" + id);
  
  if(!a_area || !e_area) return;
  
  a_area.style.display = "none";
  e_area.style.display = "block";
}

function hide_edit_area(id)
{
  var a_area = document.getElementById("a_area_" + id);
  var e_area = document.getElementById("e_area_" + id);
  
  if(!a_area || !e_area) return;
  
  a_area.style.display = "block";
  e_area.style.display = "none";
}