<div id="div-1">div-1</div>
<div id="div-2">div-2</div>
<div id="div-3">div-3</div>
<script type="text/JavaScript">
var el = document.getElementById('div-1');
el.nextElementSibling.remove(); // Removes the div with the 'div-2' id
/*
run:
div-1
div-3
*/
</script>