window.addEventListener("blur", blurBodyHandler, false);

in my JavaScript and when an element in IFrame takes focus my event handler is triggered. In WebKit browsers. Not so in Opera browser on my Smart TV. I've tried:

window.onblur = function(){}

to no avail. I've tried attaching "focus" event listener to IFrame but had no luck with that either.

However, adding event listeners on "DOMContentLoaded" and "keydown" works just fine.