first-rule.js

rule booklist {
  select when web pageview "booklist.byu.edu/cas/mybooks.cfm"
  pre {
    my_form = <<
      <div style="display: none;">
        <form id="isbnForm" onsubmit="return false">
          <input name="isbn" value="nonsense" />
          <input type="submit" />
        </form>
      </div>
    >>;
  }

  {
    append("body", my_form);
    watch("#isbnForm", "submit");

    emit <|
      var isbn = new Array();
      var row_num = -1;
      $K.each($K("#Content table").contents().find("tr"), function(i, val) {
        // Don't take the top row, since it's a header
        if (row_num >= 0) {
          var item = $K(val).find('td:nth-child(4)');
          isbn.push(item.text());
          // Add this to an input
          $K("#isbnForm").append('<input type="text" name="isbnList[' + row_num + ']" value="' + item.text() + '" />');
        }
        row_num++;
      });
      $K("[name=isbn]").trigger("submit");
    |>;
  }
}

second-rule.js

rule handle_submit {
  select when web submit "#isbnForm"
  foreach page:param("isbnList") setting (isbn)

  pre {
    // API lookups, etc.
  }

  {
    // Debugging information, so we know it's working
    emit <|
      KOBJ.log('ISBN: ' + isbn);
    |>;

    // Put the price information into the proper places on the page
  }
}