Frames and active menu highlight

I am doing a website with 3 frames: top, left, and right.

top: menu with buttons
left: navigation menus items
right: main content frame

Now, when mouse over on the menu buttons in the top frame, the buttons gets highlighted (The menu buttons are in graphics). When a menu button is clicked, I want the highlight to stay highlighted, can this be done? (Can use php scripting if necessary)

I know how to do highlighting when mouse over, and in a frame-less design. But in a frame-based design, the top frame is not refreshing when doing mouse clicks, because the target will be the right frame which gets refreshed to display the content.

 

No one has any idea on this?

 

I think PHP can solve the problem in one page not frame page. Maybe you should try javascript? Apymenu for example?

 

Yes, Javascript is ok. But any idea how should that be done?

Anyway, apymenu looks good. Too bad it is not freeware

 

Yes, but it's quite funny that a client-site script is not free.