Shiva,
If you are looking for a 3rd party control that has frameset boundary
support, there is Coalesys WebMenu.
However, I'd recommend you take a look at PanelSet for ASP.NET first. It is
essentially a web control that can mimic all of the UI features of an HTML
Frameset, except that it is done using DHTML and all on one page. There is
no trouble with frame boundaries using this model, plus you get some
features provided by the framework, such as state maintenance (preserving
where a user drags a splitter or scroll a Panel) during postback and great
cosmetic flexibility for the splitters.
PanelSet for ASP.NET:
http://www.coalesys.com/products/mercuryuiaspnet/features/panelset.asp
Online demos:
http://www.coalesys.com/products/mercuryuiaspnet/samples/panelset/default.asp
There is an eval for download there as well.
--
Regards,
Joseph King
Coalesys, Inc.
http://www.coalesys.com/