strange issue with jQuery
<p>I have a very strange issue with jQuery.</p>

<p>The problem:</p>

<pre><code>$("#button-prev").attr("disabled", "disabled");
</code></pre>

<p>This doesn't work. If I check with Firebug I see disabled="" as element attribute</p>

<p>But for example this</p>

<pre><code>$("#button-prev").attr("disablea", "disabled");
</code></pre>

<p>works as you should expect. Anyone an idea what it could be?</p>
