Actually for index you can actually strip whatever it is, just use index.php and access it directly at http://www.jalsaghar.com/
since index.php is (usually) the default file that is used to display a directory if no filename is specified, also index.html
If you REALLY want to use .html than you need to mess up with server configuration. You need to add this in .htaccess
AddType html application/x-httpd-php
You can also use ForceType, mod_rewrite, or else... However I see no reason why you should insist on using .html as PHP, it just goes against the "rules"...