fiddlePlus
by BinaryAcid
HTML
<script src="http://jslib.dotcloud.com/fiddle-require.js"></script>
<div class="yellow">
<h1>hello there</h1>
<h1>hello there</h1>
</div>
<div class="red">
<h1>hello there</h1>
<h1>hello there</h1>
</div>
JavaScript
$(function() {
//$(".yellow h1").css("background-color", "yellow");
$(".red h1").css({"background-color" : "red"});
});