<!DOCTYPE html>
<html>
<head>
<style>
div { color: red; }
div:last-child { color: green; }
</style>
<script>
window.onload = function() {
var r = document.getElementById("r");
r.remove();
}
</script>
</head>
<body>
<!-- Need extra wrapper div, because whitespace inside <body> is all weird -->
<div><div>This should be green</div><div id="r"></div></div></body>
</html>