在JSTL中使用JavaScript代码

<c:if test="${requestScope.delBookSuccess_Flag==true}">
    <script type='text/javascript'>alert('删除成功');</script>
</c:if>
<c:if test="${requestScope.delBookSuccess_Flag==false}">
   <script type='text/javascript'>alert('删除失败');</script>
</c:if>