Javascript - Show alert when specific radio button is checked on ID : <p>I need to show a alert when someone clicks on a radio button with a specific ID.</p>

<p>This is the radio button:</p>

<pre><code>&lt;input name="shipping_method" type="radio" class="validate-one-required-by-name" value="kerst_shipping_standard" id="s_method_kerst_shipping_standard"&gt;
</code></pre>

<p>And when someone clicks that radio button it needs to show a alert.</p>
