Getting scroll bar width using JavaScript
<p>The following HTML will display a scroll bar on the right inside edge of div.container.</p>

<p>Is it possible to determine the width of that scroll bar?</p>

<pre><code>&lt;div class="container" style="overflow-y:auto; height:40px;"&gt;
  &lt;div class="somethingBig"&gt;&lt;/div&gt;
&lt;/div&gt;
</code></pre>
