var _popup_win = 0;
var _popup_win_scrollbars="no";
var _popup_win_toolbar="no";
var _popup_win_status="no";
var _popup_win_menubar="no";
var _popup_win_location="no";
var _popup_win_directories="no";
var _popup_win_resizeable="no";


function OpenPopup( url, wpix, hpix )
{
  var w = wpix;
  var h = hpix;
  var x = (screen.width - w) / 2;
  if( x < 0 )
    x = 0;
  var y = (screen.height - h) / 2;

//var s = 'width='+w+',height='+h+',screenX='+x+',screenY='+y+',allwaysraised=yes,scrollbars=yes,copyhistory=yes,resizable=yes';
  var s = "width="+w+",height="+h+",screenX="+x+",left="+x+",screenY="+y+",top="+y;
  s = s + ",scrollbars=" + _popup_win_scrollbars;
  s = s + ",toolbar=" + _popup_win_toolbar;
  s = s + ",status=" + _popup_win_status;
  s = s + ",menubar=" + _popup_win_menubar;
  s = s + ",location=" + _popup_win_location;
  s = s + ",directories=" + _popup_win_directories;
  s = s + ",resizeable=" + _popup_win_resizeable;

  if( _popup_win )
    if( !_popup_win.closed )
      _popup_win.close();

  _popup_win = window.open( url,'', s );
}

function ClosePopup()
{
  if( _popup_win )
    if( !_popup_win.closed )
      _popup_win.close();
}