How know if there is a style for an id or a class?
<pre><code>// instead of 'width' could be 'font-size', 'color', 'position', etc
var result = getCSS('some_id_name_or_class_name', 'width');

// may be the value or 'null' if there is no style for such an id name or a class name
alert(result); 
</code></pre>

<p>(The matter is that there is yet no element created with such id or class.)</p>
