specifying a struts 2 action in the url field of a dojo function

[Session A Mwamufiya]

Hello,

I've been trying to get the tree view code from the showcase to work for many 
days now, and I'm literally stuck.  I use logging to determine whether action 
methods are called or not, and the following script never gets to the 
dynamicTreeSelectAction action:

<script>
    function treeNodeSelected(nodeId) {
        dojo.io.bind({
            url: "<s:url value='dynamicTreeSelectAction.action' 
/>?nodeId="+nodeId,
            load: function(type, data, evt) {
                var displayDiv = dojo.byId("displayId");
                displayDiv.innerHTML = data;
            },
            mimeType: "text/html"
        });
    };

    dojo.event.topic.subscribe("treeSelected", this, "treeNodeSelected");
</script>

Is it written properly in the showcase example (which doesn't work btw)? or is 
there another way of calling an action as part of the url?

Thanks for any help,
Session


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