Call Javascript function in JSTL

As title, can someone help me know can i can javascript function from JSTL. Like this :

<c:forEach items="${items}" var="item">
  <c:choose>
    <c:when test="${item < 100}">
      //Call Javascript Function X Here !?
    </c:when>
    <c:when test="${item >= 100}">
      //Call Javascript Function Y Here !?
    </c:when>
  <c:choose>
</c:forEach>

Javascript code :

<script>
  function X() {
    //Do X
  }

  function Y() {
    //Do Y
  } 
</script>