Partial postback in JSF

I have written one JSF page which contains a header file, foolter file and a treeview in left side and a Tabbed pane in right side. When any node of a treeview is selected, the whole page is posted back. I want only a right hand side Tabbed pane should be refreshed and not the whole page. How can I achieve this?

[320 byte] By [DSAa] at [2007-11-26 16:17:56]