Text Formatted Code
<span onClick="var e=this.getElementsByTagName('div');if (e[0].style.display=='block') e[0].style.display='none'; else e[0].style.display='block';"> …more…
<div style="display:none">
My expanding text
</div> </span>
It relies on a div tag subordinate to the span tag. The first one is taken, though you can add some magic by adjusting the number in e[0].