Its analogue buttons Like, +1, Do I like it?

Question

JavaScript

I want to make an analogue of subject buttons for my site. The button is displayed in an iframe and everything works fine, but the question is: how to do event tracking? The fact is that the button code will be included on a different domain (which is natural) and I cannot call the callback from the iframe directly.

How does Facebook, Google and all the rest???

Clarification: I know that you can hang onLoad on an iframe and change window.location.href inside it, but this does not suit me - I want to do it without reloading the iframe

Answer 1

easyXDM , fastXDM