Why use window.onload
<p>I have tried finding an answer to this on my own, but only found instructions on how to use onload events. I seem to be missing the point.</p>

<p>I've been taught that if I want something to happen when the page loads, I should use window.onload like this:</p>

<pre><code>&lt;script&gt;
    window.onload = dosomething();

    function dosomething()
    {
        window.alert('hello');
    }
&lt;/script&gt;
</code></pre>

<p>But now that I am thinking on my own I wonder what the point of doing that is. Because this also produces the same result:</p>

<pre><code>&lt;script&gt;
    dosomething();

    function dosomething()
    {
        window.alert('hello');
    }
&lt;/script&gt;
</code></pre>

<p>Anything I put at the top inside <code>&lt;script&gt;</code> is going to execute anyway... so what's the point of window.onload?</p>