Dyanmic Url to main url Rewrite Rule.....

I want to redirect my dynamic urls to 404 page

right now i m using this code

#
RewriteCond %{QUERY_STRING} ^(joke_id=[^&]+&cat_id=+) 
RewriteRule ^ http://www.example.com/%1 [R=301,L]

PHP:

I know there is problem in rewrite rule

Will u plz post the correct code so all dynamic ursl get redirected to 404 page


In simple

i want A 301 redirect to a page that actual returns a 404 http status (and not just the 404 message)

Thanks

 

Please give an example from WICH url you'd like to HTACCESS to NEW URL

example:
http://www.yoursite.com/index.php?page=test&cat=clipart
http://www.yoursite.com/clipart/test.html

or something!