Sorry, I am not sure that I understand. Anyway, you can use css to change the z-index of layers when needed. You can also give class names to your layers so it is easier to manipulate them.
As far as flippage.js, here is an example:
Sorry, I am not sure that I understand. Anyway, you can use css to change the z-index of layers when needed. You can also give class names to your layers so it is easier to manipulate them.
As far as flippage.js, here is an example: