function popupWindow(url, name, w, h, scroll)
{ 
	var l = 0;
	var t = 0;
	if (parseInt(navigator.appVersion) >= 4)
  { 
		l = (screen.availWidth - w) * 0.5;
		t = (screen.availHeight - h) * 0.5;
	}
  
	popWin = window.open(url, name, 'width=' + w + ',height=' + h + ',left=' + l + ',top=' + t + ',scrollbars=' + scroll + ',status=no,toolbar=no,directories=no,menubar=no,location=no,resizable=yes');
  popWin.focus();

  return false;
}