Why can't I use jQuery in amazon (in console)?
<p>using firebug console in firefox for example when execute this script</p>

<pre><code>$("body").css("border","4px solid red");
</code></pre>

<p>it will return an error with message:</p>

<pre><code>TypeError: $("body") is null
</code></pre>

<p>same in chrome the error:</p>

<pre><code>TypeError: undefined is not a function
</code></pre>

<p>any one knows why? and how to use it?</p>
