Navigate thru website from excel to extract data

Hi,
I like to download a spread sheet from a website.
it goes like this..
1.open the website
2.give user name and pasword and press enter.. it diplays some application icons
3.choose the application icon by mouse click.. it opens another new screen which shows the excel sheet which i like to extract and save it in a excel sheet.

I like to execute the three steps mentioned above thru vbscript from excel.

could anybody help me on this.. give some document related to this, if possible.

Note: i never worked with html and web design.

Regards!
Suku..