JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<input type="submit" value="oblicz" id="oblicz" name="oursubmit" style="background: #555555; color: #fff; margin-top: 5px;"/>
<input type="submit" value="Złóż zamówienie" id="Złóż zamówienie" disabled="disabled" style="background: blue; color: #fff; margin-top: 5px;" />

JavaScript

$(document).ready(function(){
  $("#oblicz").click(function(){
    $("#Złóż zamówienie").removeAttr("disabled","");
  });
});