function openWindowNoAddress(page_name, page_width, page_height)
{
	mainWinParams = 'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width=' + page_width + ',height=' + page_height;
	var newWindow = window.open("about:blank", page_name, mainWinParams);
	newWindow.focus();
	return newWindow;
}

function openWindowNoAddress(page_url, page_name, page_width, page_height)
{
	mainWinParams = 'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width=' + page_width + ',height=' + page_height;
	var newWindow = window.open(page_url, page_name, mainWinParams);
	newWindow.focus();
	return newWindow;
}

function openTopLeftWindowNoAddress( page_url, page_name, page_width, page_height )
{
  if( screen.width )
  {
    var winl = ( screen.width - page_width ) / 2;
    var wint = ( screen.height - page_height ) / 2;
  }
  else
  {
    winl = 0;
    wint =0;
  }

  if ( winl < 0 )
    winl = 0;
  if ( wint < 0 )
    wint = 0;

  var settings = 'height=' + page_height + ',';
  settings += 'width=' + page_width + ',';
  settings += 'top=' + 0 + ',';
  settings += 'left=' + 0 + ',';
  settings += 'scrollbars=1,resizable=1';
  win = window.open( page_url, page_name, settings );
  win.window.focus();
}

function openCenterWindowNoAddress( page_url, page_name, page_width, page_height )
{
  if( screen && screen.width )
  {
    var winl = ( screen.width - page_width ) / 2;
    var wint = ( screen.height - page_height ) / 2;
  }
  else
  {
    winl = 0;
    wint = 0;
  }

  if ( winl < 0 )
    winl = 0;
  if ( wint < 0 )
    wint = 0;

  var settings = 'height=' + page_height + ',';
  settings += 'width=' + page_width + ',';
  settings += 'top=' + wint + ',';
  settings += 'left=' + winl + ',';
  settings += 'scrollbars=1,resizable=1';
  win = window.open( page_url, page_name, settings );
  win.window.focus();
}