mod_rewrite redirect rule need help

[koas]

Hi i have cpanel hosting with hostgator

and when i make a subdomain with cpanel
example
http subdomain. mainwebsite. com

the subdomain is than olso on this url
www mainwebsite.com / subdomain /

And i dont whant to have access to www mainwebsite.com / subdomain /


becuas google have index the website www mainwebsite.com / subdomain /


so i whant to have that only subdomain. mainwebsite. com
is spider by search engines and that visitors olso go to that website

so what do i need to putt in my .htaccess file

[James]

Google is your friend :)

http://www.webmasterworld.com/forum92/1763.htm