var newWin = null;
 
function openWin(imageURL)
{
  if ( ( newWin == null )
    || newWin.closed )
  {  }
  else
  {
	newWin.close();
  }
  
	newWin = open( imageURL, "", "height=400,width=600,channelmode=0,dependent=1,directories=0, directories=yes, copyhistory=yes,location=yes, resizable=yes, menubar=yes,resizable=1,scrollbars=yes,status=yes,toolbar=yes" );
    newWin.focus();
}