How to disable URL encoding?

Question

HTML

I'm trying to add a search to an old site with 1251 encoding and Cyrillic is encoded in "%EF%EE%E8%F1%EA"
Search form:

<form id="searchForm"  action="/poisk.html" target="_self">
  <input  type="text" name="q" value="Поиск" id="search">
  <input type="submit" value="Поиск" id="submit">
</form>

Everything works with the Latin alphabet, opens the desired url site.ru/poisk.html?q=poisk, and the Cyrillic alphabet changes to this site.ru/poisk.html?q=%EF%EE%E8%F1%EA
url opened like this http://site.ru/poisk.html?q=search ?

Answer 1

change the js url