function getRelLeft(el)
{
  var pos = el.offsetLeft;
  while (el.offsetParent != null)
  {
    el = el.offsetParent;
    pos += el.offsetLeft;
    if (el.tagName == 'BODY') break;
  }
  return pos;
}
function getRelTop(el)
{
  var pos = el.offsetTop;
  while (el.offsetParent != null)
  {
    el = el.offsetParent;
    pos += el.offsetTop;
    if (el.tagName == 'BODY') break;
  }
  return pos;
}

function show_menu(menu_name,menu_obj)
{
  document.all['menu_vicado'].style.display="none";
  document.all['menu_mer'].style.display="none";
  document.all['menu_mfe'].style.display="none";
  document.all['menu_stat'].style.display="none";
  document.all['menu_stal'].style.display="none";
  if (menu_name == 'menu_mer'){
  document.all[menu_name].style.display="";
  document.all[menu_name].style.top=getRelTop(menu_obj)+22;
  document.all[menu_name].style.left=getRelLeft(menu_obj)+85;
  }else{
  document.all[menu_name].style.display="";
  document.all[menu_name].style.top=getRelTop(menu_obj)+22;
  document.all[menu_name].style.left=getRelLeft(menu_obj)+50;
}}
function hide_menu()
{
  document.all['menu_vicado'].style.display="none";
  document.all['menu_mer'].style.display="none";
  document.all['menu_vicado'].style.display="none";
  document.all['menu_mfe'].style.display="none";
  document.all['menu_stat'].style.display="none";
  document.all['menu_stal'].style.display="none";
}