One of the little known HTML5 APIs is the window.postMessage API.  window.postMessage allows for sending data messages between two windows/frames across domains.  Essentially window.postMessage acts as cross-domain AJAX without the server shims. Let’s take a look at how window.postMessage works and how you can use it today in Firefox, IE8+, Opera, Safari, and Chrome. View [...]

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Full David Walsh Blog Post: HTML5′s window.postMessage API

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