I have a rich faces tree which gets the value from the backing bean. Now as soon as this tree node is selected , I want to call a js function that does sumthing with current selection. How can i get the selected tree node value in js function.

My tree node is:

<rich:tree value="#{echoBean.stationNodes}" var="station">
 <rich:treeNode onselected="updateFields()">
 <h:outputText id="treenode" value="#{station}" />
</rich:treeNode>
</rich:tree>