var popupHandle;

function closePopup() 
      {
      if(popupHandle != null && !popupHandle.closed) popupHandle.close();
      }
function OpenInformation()
	 {
	  closePopup();
      popupHandle = window.open('About.htm', 'anew',config='height=490,width=580,scrollbars=yes,resizable=no');
	 }

function OpenFileUpload()
	 {
	  closePopup();
      popupHandle = window.open('/php/upload_phase1.php', 'anew',config='height=700,width=850,scrollbars=yes,resizable=yes');
	 }