outputLink, graphicImage & portlet

[Storm Spire]

from the jetspeed jpetstore demo, I can see struts demo works well with links, like the one inside /index.jsp, it writes
<html:link href="">    <html:img border="0" imageName="img_cart" src=""
</html:link>

inside the jsf-demo, the image link works ok as well, like:
<h:graphicImage id="waveImg" url="" />

but it doesn't work with outputLink, if I add the following:
    <h:outputLink id="treeTableLink2" value="treeTable.jsf">
        <h:outputText value="Click Here for Tree Table"/>
    </h:commandLink>

the portal generate the link without any portal context, just like http://127.0.0.1:8080/treeTable.jsf, but above image's URL is http://127.0.0.1:8080 /jsf-demo/wave.med.gif, quite strange behavior.

just wonder why graphicImage works perfectly with portlet, but outputLink doesn't.

if outputLink doesn't work, anyway to go to another page without going through bean and navigation rules?