Popular select option based on choice of another select option

Hello,

I'm popping a select option using useBean .

<jsp:useBean id=“catDAO” class=“contas.categoria.CategoriaDAO”/>

<c:forEach var=“categoria” items="${categoriaDAO.lista}">

<option value="${categoria.idcategoria}">${categoria.descricao}</option>                

</c:forEach>

I need to populate a new select based on selecting the select category. How do I do this?