@didic thanks for your in depth review. Learning a language along with these posts is not a bad deal for non-English people. So I welcome your harsh comments. However you were so kind while writing this.
As I mentioned that this application is very small and has very less scope for any new feature, I also meant that there is nothing left to add in this post. I would be happy to know what exactly we miss in this post which makes this post insufficient.
RE: Fast Freeze - Make an object read only in Javascript