xui-orientation.js

var current_orientation; // Cache orientation.

x$('body').orientationchange(function() {
    var newOrientation;

    switch (window.orientation) // Switch out the windows orientation
    {
        case 0:
        case 180: // Upside down.
            newOrientation = 'portrait';
            break;
        case -90:
        case 90:
            newOrientation = 'landscape';
            break;
    }

    if (current_orientation != newOrientation) // Ensure the new orientation isn't the same as the current.
    {
        x$('body').addClass(newOrientation);
        x$('body').removeClass(current_orientation);

        orientation_str = newOrientation; // Cache current orientation for comparison,
    }
});