Using Excel Script on Website?

Hi Guys,
I have designed a nice simple excel spreadsheet calendar for Farmers to track their rainfall and weather.
I just need some advice please.
I want to create a website for this spreadsheet where farmers can sign up and enter their data on their speadsheet online, does anyone know if this is possible? And if anyone could point me in the right direction to scripts etc?
If that can't be done, my only other option is offering it as a download.
Cheers Guys!
Billy