var _refsWindow = null;

function ReferencePopup(loc1) 
{
  if ((_refsWindow == null)||(_refsWindow.closed)) 
  {
    _refsWindow=window.open(loc1,"_refsWindow","resizable,toolbar=no,scrollbars=yes,width=600,height=415");
    _refsWindow.opener = top;
  } 
  else 
  { 
    _refsWindow.location.href = loc1;  
  }
  _refsWindow.focus();
}