function openWindow( mylink ) {

  window.open( mylink, "_blank" );

  return false;

}

function openPopup( mylink, windowname, width, height, scrollbars ) {

  if ( !window.focus ) return true;

  var left = (screen.availWidth - width ) / 2;
  var top = (screen.availHeight - height ) / 2;
  var href;

  if (typeof(mylink) == 'string')
    href=mylink;
  else
    href=mylink.href;  

  window.open( href, windowname, "height="+height+",width="+width+",resizable=no,scrollbars="+(scrollbars ? "yes" : "no" )+",status=no,toolbar=no,menubar=no,location=no,left="+left+",top="+top );

  return false;

}