When mixing JSTL tags with Struts tags, your best bet is to use the struts-el version of the tags.
To do this, put the following line in your
jsp:
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html-el" prefix="html-el"%>
Also, make sure that struts-el.jar is in your WEB-INF/lib directory.
Then you can just do this: