Addition of two sets of selectors in one
<p>I want to add to sets of selectors to one set.</p>

<p><em>For example:</em> </p>

<p><code>$("div")</code> gives me all sets of div and <code>$("span")</code> gives me all sets of span.</p>

<p>Now I want to add them to form one set of selectors which contain all spans and divs.</p>

<p>Avoid to advice for adding class, I need to merge this two sets only.</p>
