Defining variables in jQuery
<p>Can someone explain the difference between using a $ when defining variables in jQuery and not. Does it have any impact on performance?</p>

<pre><code>var $someVar = $("a");
var someVar = $("a");
</code></pre>

<p>Also, what is the difference in calling variables with and without $(someVar) For example:</p>

<pre><code>$(someVar).html();
someVar.html();
</code></pre>
