You can also use this, and style it as you please. It works on posts and slides (and adding it was about 5% of the work of beating up the JavaScript of the other, which I might still do as a point of curiosity).
Display by default:
Hidden by default:
Display by default:
Code:
<div class="slideheader">I am yo header</div>
<div class="slidecontent">Toggle meee</div>
Hidden by default:
Code:
<div class="slideheader">I am yo header click mee</div>
<div class="slidecontent" style="display: none;">Toggle meee</div>