function abreJanela(codCat,cod) {
  vWinCal = window.open("produtosExtensao.php?codCat="+codCat+"&cod="+cod, "prodExt", "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=0,width=600,height=400,top=100,left=100");
  vWinCal.opener = self;
  ggWinCal = vWinCal;
}