I found an issue with the chapter 2 solution. Apparentley the document.addEventListener() method is unreliable. This help me fix the problem. Change line 68 from: documentntListener("load", resetForm, false); to: window.addEventListener("load", resetForm, false);

Errata: The index.html file in ch 2-4 has a problem on line 41 should be:
input id="submit" type="button" value="Submit"