how to reinstall facebook on homepage?

[Manas]

it depends on the kind of browser u have. if u have google chrome. open fb now in the menu of chrome (top right corner below close button) select settings. under the 'on startup tab' select 'open a specific set of pages' and click on select pages. now you can either type the url 'www.facebook.com' or open fb and select 'use current page'.
if u use internet explorer, open internet options from control panel and set the homepage