Have JSF 1.2 two pages(one.xhtml and other.xhtml),
that are included to the current page by following rule:
...
In addition to BalusC's answer:
Note that this only supports strings, not action methods. For the latter you would need to upgrade to JSF 2.0 and use composite components.
There is a way to do this with JSF 1.2, though it's somewhat ugly:
<ui:include src="general.xhtml">
<ui:param name="actionBean" value="#{myBackingBean}" />
<ui:param name="actionMethod" value="edit" />
</ui:include>
and
<h:commandButton action="#{actionBean[actionMethod]}" />
You need to nest <ui:param>
inside <ui:include>
to pass parameters to the included file.
<ui:include src="general.xhtml">
<ui:param name="action" value="actionOne" />
</ui:include>
and in the include:
<h:commandButton action="#{action}" />
Note that this only supports strings, not action methods. For the latter you would need to upgrade to JSF 2.0 and use composite components.