<pclass="desc"><strong>Description: </strong>Selects all elements that are hidden.</p>
<divclass="longdesc">
<p>Elements can be considered hidden for several reasons:</p>
<ul>
<li>They have a display value of none.</li>
<li>They are form elements with type="hidden".</li>
<li>Their width and height are explicitly set to 0.</li>
<li>An ancestor element is hidden, so the element is not shown on the page.</li>
</ul>
<p>How <code>:hidden</code> is determined was changed in jQuery 1.3.2. An element is assumed to be hidden if it or any of its parents consumes no space in the document. CSS visibility isn't taken into account (therefore <code>$(elem).css('visibility','hidden').is(':hidden') == false</code>). The <ahref="http://docs.jquery.com/Release:jQuery_1.3.2#:visible.2F:hidden_Overhauled">release notes</a> outline the changes in more detail.</p>