Implementation of onclick
<p>Suppose that we have:</p>

<p><code>&lt;input type="button" name="button" value="Validate Payment" onclick="Validate()" /&gt;</code></p>

<p>We can put in the onclick: </p>

<ol>
<li><code>onclick="Validate"</code></li>
<li><code>onclick="Validate()"</code></li>
<li><code>onclick="Validate();"</code></li>
</ol>

<p>My question is what is the difference between these 3 implementation </p>
