Web Messaging - sending messages

Question

I have question :) Can I send message via Web Messaging or not to other tab in browser? For example I have openede my site, and now watching on other site. And when some condition will be pass my site sends messages which makes alert on the other page.

Answer 1

Assuming you have control over both pages, the answer is "yes", provided you open the second window from the first. window.postMessage only works if you can get a handle to the window. Therefore, if your background site were to invoke window.open() to get to your "other" site, then you could retain a handle to it in your first page's script.

As far as opening it in a tab goes, you'll have to specify that in your browser options.