var buscaWin;

  function openBuscaWin() {
    if (buscaWin && !buscaWin.closed) buscaWin.focus();
    else buscaWin = window.open('/produtos/busca_form.php', 'buscaWin', 'width=450,height=210,scrollbars=no');
  }

  function openBuscaSimilaresWin() {
    if (buscaWin && !buscaWin.closed) {
      buscaWin.focus();
      buscaWin.location.href = '/produtos/similares_form.php';
    } else buscaWin = window.open('/produtos/similares_form.php', 'buscaWin', 'width=450,height=210,scrollbars=no');
  }