In firefox,'fadeIn' does not work
<p>I have code following:</p>

<pre><code>&lt;style type="text/css"&gt;
body
{
    display:none;
}
&lt;/style&gt;
&lt;script type="text/javascript" src="jquery-1.8.1.js"&gt;&lt;/script&gt;
&lt;script type="text/javascript"&gt;
$(function(){
    $('body').fadeIn();
    //$('body').css("display","block");
});
&lt;/script&gt;
&lt;title&gt;Insert title here&lt;/title&gt;
&lt;/head&gt;
&lt;body&gt;
    123456
&lt;/body&gt;
&lt;/html&gt;
</code></pre>

<p>But,fadeIn does not work, and $('body').css("display","block") works without any issue,what is the problem</p>
