Problems Rewriterule in htaccess

Anybody pls help me to write rewriterule in htaccess file

[sheebatg]

Hi all,

I cant create subdomains at dynamic. I need to redirect the url [hostname...] to [somename.hostname...] or [hostname...]

Pls anybody help me to write rewriterule to htaccess file for the above problem.

Thanks in advance

Sheeba