Hi,
there's surely plenty of way of doing so,
depend of your exact needs.
Well one way is do dynamically refresh with
javascript.
1) first check the conditions
2) generate a new "left" HTML page with
dynmically generated javascript
3) this javascript is executed
4) so a new PHP prg (or HTML page) is called
to appear in the "right" frame
Maybe there's more simplier way to do that but ...
the javascript code is called using the
Onload() event (launch when the new "left"
page is displayed. It's a way of automatically
launch a Javascript, without the user
interaction.
then using Javascript method
like "<frame_name>.location.href=<new HTML page>"
There's a good Javascript/Frame FAQ here :
http://developer.irt.org/script/frame.htm
Regards,
Hervé.