MS said:
thanks for the reply. but i could not find out if my
website will become unavailable to people while i am
working on it.
The short answer is 'No,' it is not unavailable while you are working on it.
The slightly longer answer is it is generally bad practice to work directly
on your live site. For one thing, you don't have a backup in case your web
host has problems. Also, as with most things, building a web page is an
iterative process which means you may save multiple times while working on
an individual page. That means visitors can watch your testing as it
happens. For most people, this isn't desirable.
I'd suggest that you copy your website down to your local PC and work on it
there then publish changes back up to your live server. To publish to your
local computer, open your live site and select "File | Publish" and publish
to a path on your harddrive, "C:\mywebsite," for example.
Good luck!