switching views

I would to seek your help regarding turning on and off layers.

In my map, I am aiming to have two views: a graphical view and an aerial view. How do I make it such that a user will only have to click a link in the page and will transform the view from a graphical one (shape files) to an aerial one (aerial pphotograph). I have seen a campus map of MIT (http://whereis.mit.edu/map-jpg)
that employs this kind of method.

I believe the principle here is that I only have to turn off the graphical layers and then
turn on the aerial photograph layer when the view is switched... But how will I do it? How do I make a link in my html file that will turn on the photo layer and turn off the
others, and vice versa?

I tried having two sets of map files.. one for shape file layers and the other for the
aerial photograph.. However, I think it was not useful because when the view is switched, the scale at which the map is displayed before the switch was not preserved.

I consulted Jacob Delfos about this and he said the solution is though the use of _javascript_s. But I am nowhere at _javascript_.

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