ASp Spreadsheet

i am having a problemn thinking on a solution to make a web application.
This is the scenario: I have to make an application that should catch some
user data on the screen and pass it to a database. Here is the problemn: the
data that the user will pass is huge. I am talking about some columns and 27
rows.

3 rows as caption rows and the other 24 to get the data. How can i do
that? I thought about making columns with textboxes (with ids like R1C1,
R2C2, R1C4...) in a dynamic table inside a form and submit it.

But the boss
wants an excel spreadsheet look into it. I am relutant about using OWC
because first, i don't know if the users will have the office installed and
secondly because if they do have office installed, how can i know what
version of office is everybody using? Code: