Hi,
You may use
<rich:scrollableDataTable ...>
<a:support event="onRowClick">
<f:setPropertyActionListener value="#{scrollableDataTableVariable}" target="#{Bean.instance}"/>
</a:support>
</rich:scrollableDataTable>
As the query is realted to RichFaces you may find the details at:
http://www.jboss.org/index.html?module=bb&op=viewforum&f=261