<script type="text/javascript" src="/js/jquery.js"></script>
<dt id="term-1">term 1</dt>
<dt id="term-2">term 2</dt>
<dt id="term-3">term 3</dt>
$("#term-2").nextUntil("dt").css("background-color", "red");
var term3 = document.getElementById("term-3");
$("#term-1").nextUntil(term3, "dd").css("color", "blue");