Untitled

<!DOCTYPE html>
<html>
<body>

<p>START</p>

<div class="cone">
  <h2>Foo</h2>
  <p>bar</p>
</div>

<p>END</p>

<script>
//var r = document.getElementsByTagName("div")[0].className
var r = document.getElementsByClassName("cone");
r.removeChild(r.childNodes[0]);
</script>

</body>
</html>