by "changeable" do you mean that you want people to be able to play with
different options on the internet (like a mortgage calculator type thing) or
do you want them to be able to write the information back to your original
excel file stored on your hard disk?
well its for a business which owns 3 shops accross the uk and i was thinking
of putting the spreadsheet on a web site or the internet so that they can
enter their data, eg how much they have taken each day, staff hours ect.
this is definitely not something i know very much about - so hopefully
someone more knowledgeable will pop up and provide a better answer ...
because AFAIK you can't use Excel to feed information FROM a web page back
to a file located on a hard drive.
You need to use Access and FrontPage to do this sort of thing.