title: Center form submit buttons HTML / CSS
body: <p>I'm having troubles centering my HTML form submit buttons in CSS.</p>
  
  <p>Right now I'm using:</p>
  
  <pre><code>    &lt;input value="Search" title="Search" type="submit" id="btn_s"&gt;
      &lt;input value="I'm Feeling Lucky" title="I'm Feeling Lucky" name="lucky" type="submit" id="btn_i"&gt;
  </code></pre>
  
  <p>with this CSS content</p>
  
  <pre><code>#btn_s{
      width: 100px;
      margin-left: auto;
      margin-right: auto;
  }
  
  #btn_i {
      width: 125px;
      margin-left: auto;
      margin-right: auto;
  }
  </code></pre>
  
  <p>And it's not doing anything. I know I'm probably doing something stupid wrong. How can I fix this?</p>