/* dropdown */

  var timeout	= 1;
  var closetimer	= 0;
  var ddmenuitem	= 0;

  function mopen(id)
  {
  mcancelclosetime();

  if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';

  ddmenuitem = document.getElementById(id);
  ddmenuitem.style.visibility = 'visible';

  }
  function mclose()
  {
  if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
  }

  function mclosetime()
  {
  closetimer = window.setTimeout(mclose, timeout);
  }

  function mcancelclosetime()
  {
  if(closetimer)
  {
  window.clearTimeout(closetimer);
  closetimer = null;
  }
  }

  document.onclick = mclose;