title: Struts2 s:url for a image in s:submit not working
body: <p>I have a JSP with this form:</p>
  
  <pre><code>&lt;s:form action="GestionPagos.action"&gt;
      &lt;s:hidden key="actividad.id" /&gt;
      &lt;s:submit type="image" 
          src="&lt;s:url value ="/Internal Resources/imagenes/alta.png"/&gt;"&gt;
      &lt;/s:submit&gt;
  &lt;/s:form&gt;
  </code></pre>
  
  <p>But, when I try to render it in my browser, struts throws this error:</p>
  
  <pre><code>org.apache.jasper.JasperException: /Private/GestionCalendarios/MenuCalendario.jsp (línea: 144, columna: 1) /Private/GestionCalendarios/ListadoActividadColaboradores.jsp (línea: 51, columna: 64) Tag &lt;s:submit not ended
  </code></pre>
  
  <p>I'm pretty sure that this tag worked before, but after a update, it didn't work anymore.</p>
  
  <p>I can make it work using a classic HTML input tag, or splitting the button into two steps: using the url tag with a variable and then, using in the src field of the submit. But I want to know why isn't working together and what is the correct form of the tag.</p>