title: How to check a radio button with Selenium WebDriver?
body: <p>I want to check this radio button, but I didn't know how.
  My HTML is:</p>
  
  <pre><code>&lt;div class="appendContent"&gt;
  
      &lt;div&gt; id="contentContainer" class="grid_list_template"&gt;
          &lt;div id="routeMonitorOptions"&gt;&lt;/div&gt;
      &lt;/div&gt;
  
      &lt;input id="optionStopGrid" type="radio" name="gridSelector"/&gt;
      &lt;label for="optionStopGrid"&gt;Paradas&lt;/label&gt;
  &lt;/div&gt;
  </code></pre>