SO fiddle

Test Fiddle mainly for SO Questions

by Nick Craver

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.4/themes/overcast/jquery-ui.css">
<fieldset><legend>Link</legend><span>CHECK</span></fieldset>

CSS

span { display: none; }

JavaScript

$("legend").click(function(){ 
    $(this).siblings("span").show(); 
});