Frames? Navigation? ASPX

Hi all,
Using ASP.net in visual studio.net:

I have an aspx page which has a few buttons at the top. Each button fills a different datagrid and then hides the other datagrids and controls not associated. This works fine but my page is getting very messy and difficult to work with. Is this the best way to allow the user to navigate the different buttons?

Should I use a frameset? If so, how would i get the buttons in the topframe to action the mainframe as if they were in the same frame? Can't seem to pass messages - can I use global varibles across all frames somehow?

Any advice, ideas or examples would be great. I am new to this.

Thanks,
Adam.

stay away from frames! they are the devils stuff!

why do you have different datagrids? can't you change the look and data in them dynamically.