function ptext(o)
{
  if (typeof lst != 'undefined') lst.style.fontWeight="normal";
  o.style.fontWeight="bold";
  lst=o;
  if (typeof txt_pop == 'undefined') txt_pop = document.getElementById("txt_pop");
  txt_pop.innerHTML=document.getElementById("H"+o.id).innerHTML;
  window.status=o.id;
}