js里不能嵌套struts标签？该如何处理

js里不能嵌套struts标签？

JScript code

        <script type="text/javascript">        <!--        d = new dTree('d');    d.config.stepDepth = 2;            d.add(0,-1,'My example tree');        <logic:iterate id="tree" name="treelist" scope="request">            ${tree.id};        </logic:iterate>            document.write(d);        //-->        </script>