var popupHandle;

function closePopup() 
      {
      if(popupHandle != null && !popupHandle.closed) popupHandle.close();
      }
function OpenInformation()
	 {
	  closePopup();
      popupHandle = window.open('information.html', 'anew',config='height=640,width=680,scrollbars=yes,resizable=no');
	 }