Javascript Spreadsheet update

So I've been working again on the spreadsheet I was creating before, and I've worked out some technical difficulties. The new version is also slightly nicer in appearance than the old version, although I need to get it looking the same in everyone's browser.

You can check it out here.

It's not fully featured yet, but I have yet to decide what features of a regular spreadsheet I should implement, and what features are unnecessary.

Also, I've created a module to port this spreadsheet into Drupal, which could turn out to be very useful.

Dave