What does the jQuery selector $("element", $(document.body)) do?
<p>I am trying to figure out what in the world this jquery selector is doing. When it runs, it is executing on a massive scale and removing it increases execution speed by roughly 95%. The optimized code works fine without it, but I am still trying to figure out what it was doing in the first place.</p>

<p>Here is the original code format:</p>

<pre><code>$("[name='" + this.Name + "']", $(document.body))...
</code></pre>

<p>The item I'm trying to figure out is what is after the comma. It's not a normal part of the selector, as it is outside the main batch of quotes, and I have had no luck at all finding documentation on anything like this. When the code is reduced to </p>

<pre><code>$("[name=\"" + this.Name + "\"]")
</code></pre>

<p>then it operates at a massively increased speed (95% faster). Does anyone know what that extra <code>$(document.body)</code> is doing?</p>
