ErrorDocument 404 /index.html

RewriteEngine on
RewriteCond %{HTTP_HOST} ^([a-z.]+)?jsbluesea\.com$ [NC] 
RewriteCond %{HTTP_HOST} !^www\. [NC] 
RewriteRule .? http://www.jsbluesea.com%{REQUEST_URI} [R=301,L] 

RewriteRule ^search\.html$ search.php
RewriteRule ^search_([0-9]+)_([0-9]+)_(.*)\.html$ search.php?page=$1&page2=$2&keywords=$3 [QSA,L]
RewriteRule ^search_(.*)\.html$ search.php?keywords=$1