How to detect Facebook Like button pressed and trigger event?

Question

Here is the example:

• http://www.facebook.com/UEvents?v=app_4949752878&ref=ts

These guys get people to click on Like button (in Step 1) first bef

Answer 1

One can detect when a user clicks on like button using edge.create. Also if the user has already liked the page, it can detected using FQL Like Table.