what technologies to use to create excel/spreadsheet-like web app?

Trying to create an excel-like tool that groups csv's and has specific rules for each column, and开发者_如何学编程 some columns where you can insert images/paths associated. User should be able to login with difference permissions, export/import spreadsheets, see older versions of them, and customize new/existing columns with different rules.

Any advice/ideas for what I should use backend/frontend? I am starting out with Cappuchino.

Have you tried table-tools? http://www.datatables.net/

I would recommend taking a look at the grid that's a part of the jqwidgets project. There's a "spreadsheet" example, although I think some of the other grid demos there might be more useful.

I've used the datatables project, and it's very powerful, but it forces you to structure your JSON in a way that I think is unnatural and forced. In other words you can't just build your JSON in the most logical way and expect datatables to consume it: it has to be specifically tailored to the needs of datatables, in a way I didn't like. Other than that it's quite awesome.