I wish to do something very simple but never get the answer how to do it:-

Requirement 1:
I want to create a web page with an input text box and a button. I want when
user key in value in text box on this web page and push the button, the data
sent to a cell in Excel file. Mission impossible ? I do not want Excel
File Save as Web.

Requirement 2:
Similar to Requirement 1 except the web have a slide bar. As user drag the
slide bar the value in an cell on Excel worksheet changes.

Help !!!