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Detecting orientation change on mobile devices

This code will add an action listener to your window. A value of 0 means portrait view, -90 means a the device is landscape rotated to the right, and 90 means the device is landscape rotated to the left.

window.addEventListener("orientationchange", function() {
	// Announce the new orientation number
	alert(window.orientation);
}, false);

Source: http://davidwalsh.name/orientation-change...

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