Hack to solve the annoying iPad iOS7 landscape extra height issue on the fullscreen web applications http://stackoverflow.com/questions/19012135/ios-7-ipad-safari-landscape-innerheight-outerheight-layout-issue

iPad-IOS7-landscape-fullscreen-hack.js

/*!
*
* Author: Gianluca Guarini
* Contact: gianluca.guarini@gmail.com
* Website: http://www.gianlucaguarini.com/
* Twitter: @gianlucaguarini
*
*
**/
if (navigator.userAgent.match(/iPad;.*CPU.*OS 7_\d/i)) {
  var htmlTag = document.getElementsByTagName("html")[0],
    onOrientationChange = function() {
      if (window.orientation === 90 || window.orientation === -90) {
        htmlTag.style.height = window.innerHeight + 'px';
        window.scrollTo(0, 0);
      } else {
        htmlTag.style.height = '100%';
      }
    };

  window.addEventListener('orientationchange', onOrientationChange, false);
  // to get the focus out of the keyboard
  window.addEventListener('focusout', function(e) {
    // it must be async because we must wait the end of the keyboard animation
    setTimeout(onOrientationChange, 500, e);
  });
  // to block the normal scroll behavior
  htmlTag.addEventListener('touchmove', function(e) {
    e.preventDefault();
  }, false);
  onOrientationChange();
}