RewriteEngine on 
RewriteRule ^/?(index)\.html$ index.php [L]
RewriteRule ^/?(forum)-([0-9]+)-([0-9]+)\.html$ index\.php\?act=$1&fid=$2&$p=$3 [L]
RewriteRule ^/?(thread)-([0-9]+)-([0-9]+)-([0-9]+)\.html$ index\.php\?act=$1&tid=$2&fid=$3&p=$4 [L]
RewriteRule ^/?(post)-([0-9]+)-([0-9]+)\.html$ index\.php\?act=$1&tid=$2&fid=$3 [L]
RewriteRule ^/?(jh)-([0-9]+)-([0-9]+)-([0-9]+)\.html$ index\.php\?act=$1&tid=$2&fid=$3&p=$4 [L]
RewriteRule ^/?(zd)-([0-9]+)-([0-9]+)-([0-9]+)\.html$ index\.php\?act=$1&tid=$2&fid=$3&p=$4 [L]
RewriteRule ^/?(del)-([0-9]+)-([0-9]+)-([0-9]+)\.html$ index\.php\?act=$1&tid=$2&fid=$3&p=$4 [L]