Detect iOS devices orientation with jQuery

jquery.ios-orientation.js

/*
* http://pixelhunter.me/post/28843693624/detect-orientation-jquery
*/
function checkMode() {
  var o = window.orientation;

  if (o != 90 && o != -90) {
    // here goes code for portrait...
  } else {
    // here goes for landscape...
  }
}

// check orientation on page load
checkMode();

// listen for orientation changes
$(window).bind('orientationchange', function() {
  checkMode();
});