Mini-dvi to vga and svideo

I am using my MacBook a lot with an external screen (mini-dvi to vga adapter) and with my TV using the mini-dvi to svideo adapter.
I am getting tired of switching between both adapters and the switching might wear off the mini-dvi female plug on my macbook.
Actually I am looking for a mini-dvi switchbox, so i can connect both setups (vga and svideo) and choose between them by using the switch of the switchbox. Unfortunately I cannot find a switchbox like this, and I doubt whether it exists.
I believe an alternative to first use a mini-dvi to dvi adapter does not work. Suggested setup would be then:
mini-dvi --> dvi --> dvi splitter --> dvi-vga and dvi-svideo. But i believe the mini-dvi --> dvi adapter discards the analog signal. Last option would be to construct a splitter myself, needing the proper mini-dvi ports (1 male, 2 female).
Anyone any ideas on this topic?

MB560 wrote:
1. In Mac system, I only get blue screen of computer on TV with out any writing or pictures or tool bar.
This is normal in extended desktop. You can drag anything you want from the main screen to the external screen. I prefer it this way when I am watching MLB.TV. I keep the game on my external and use my internal work surfing and other stuff.
You can use the F7 key to switch back and forth

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