<IfModule mod_rewrite.c>
RewriteEngine on
RewriteRule ^tracking$ index.php?op=tracking [L]
RewriteRule ^keluar$ index.php?op=out [L]
RewriteRule ^login$ index.php?op=login [L]

# serve custom error pages
ErrorDocument 400 /404.php
ErrorDocument 401 /404.php
ErrorDocument 403 /404.php
ErrorDocument 404 /404.php
ErrorDocument 500 /404.php

</IfModule>