Redirect using .htaccess

My main domain : http://www.mydomain.com

I have 3 directories in my domain:

http://www.mydomain.com/cms
http://www.mydomain.com/blog
http://www.mydomain.com/forum

I want that whenever someone types www.mydomain.com he must go to http://www.mydomain.com/cms and later my other folders are anyways linked via menu items in my CMS, however the br开发者_JS百科owser must show as http://www.mydomain.comonly for the main page rest can be regular display.

I read some time back somewhere that it is possible to do so using the .htaccess file

Is it really possible to do this? If yes then how?

Kindly help.

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Try this mod_rewrite rule:

RewriteEngine on
RewriteRule ^$ cms