"hasClass" with javascript? or site with jquery to javascript translation?
<p>How do you do jQuery's <code>hasClass</code> with plain ol' javascript?  E.g., <code>&lt;body class="thatClass" /&gt;</code>  What's the javascript way to ask if <code>body</code> has "thatClass"?</p>

<p><em>Also, anyone know of a site that explains that gives javascript versions of many jQuery functions?  I often find myself looking for answers to similar questions.</em></p>
