extend onclick function
<p>I have a onclick function like this</p>

<pre><code>onclick = function(){alert('hello')}
</code></pre>

<p>I want to add an additional function to it base on the server response so that I can display more, like not only display hello but also 'you are welcome', how to writ this without jquery?</p>

<pre><code>onclick = function(){alert('you are welcome')}
</code></pre>

<p>thank you for helping.</p>
