what event triggered when a page themes changed

Question

Hi all what event triggered when a page themes changed at dynamically? i faced this question in an interview..

ex: In orkut when we press the themes link/button we can get what we wanted..

thanks saj

Answer 1

There is no event specific for changing the page theme because the theme can only be changed inside the Page's PreInit event.

Answer 2

In addition to Microgen's comment here is a link for you to see a solution.