var timeout	= 500;
var closetimer	= 0;
var ddmenuitem	= 0;

function popup(mylink, windowname) {
if (! window.focus)return true;
  var href;
  if (typeof(mylink) == 'string')
    href=mylink;
  else
    href=mylink.href;
  window.open(href, windowname, 'width=800,height=600,scrollbars=yes');
  return false;
}

function mopen(id) {	
  mcct();
  if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
  ddmenuitem = document.getElementById(id);
  ddmenuitem.style.visibility = 'visible';
}

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

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

function mcct() {
  if (closetimer) {
    window.clearTimeout(closetimer);
    closetimer = null;
    }
}
document.onclick = mclose;