function closeall()
 {
  var divarray = document.getElementsByTagName('div');
  var nbelem = divarray.length;
  for (var i=0; i<nbelem; i++)
  {
   var curdiv = divarray.item(i);

   if (curdiv.dynamic == 'yes')
    { curdiv.style.display = 'none'; }
  }
  return;
 }

 function opendiv(target1, target2)
 {
  var curdiv = document.getElementById(target1);
  curdiv.style.display = 'block';
  var curdiv = document.getElementById(target2);
  curdiv.style.display = 'none';
  return;
 }