Stalker_RED

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)\.html$ $1.php?%{QUERY_STRING} [L]

# если файл не существует, будет вызван index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^.*$ index.php [L]

var blockControls = document.createElement('div');
var btn = document.createElement('button');
blockControls.appendChild(btn)

There are 2 hard problems in computer science: cache invalidation, naming things, and off-by-1 errors.