(function($) {
  $.fn.fullscreen = function(options) {
    
    var settings = $.extend({
      to: false, 
      exit: 'Normal size',
      onScreenChange: $.noop,
      onFail: $.noop
    },options);
 
    var methods = {
 
      run: function() {
        var selector = !settings.to ? this : $(this).find(settings.to);
        settings.full = selector[0].innerText;
        $(this).on('click',function() {
          if (!methods.is()) {
            if (methods.enter()) {
              selector[0].innerText = settings.exit;	
            } else {
            	settings.onFail();
            }
          } else {
            selector[0].innerText = settings.full;
            return methods.exit();
          }
        });
        $(document).on('fullscreenchange mozfullscreenchange webkitfullscreenchange', function() {
          return settings.onScreenChange( methods.is() );
        })
      },
 
      is : function() {
        return document.fullscreen || document.fullscreenElement || document.mozFullScreen || document.webkitIsFullScreen || false;
      },
 
      enter : function() {
        if (document.documentElement.requestFullscreen) {
            document.documentElement.requestFullscreen(); return true;
        }
        else if (document.documentElement.mozRequestFullScreen) {
            document.documentElement.mozRequestFullScreen(); return true;
        }
        else if (document.documentElement.webkitRequestFullScreen) {
            document.documentElement.webkitRequestFullScreen(); return true;
        }
        else {
          return false;
        }
      },
 
      exit : function() {
        if (document.exitFullscreen) {
            document.exitFullscreen();
        }
        else if (document.mozCancelFullScreen) {
            document.mozCancelFullScreen();
        }
        else if (document.webkitCancelFullScreen) {
            document.webkitCancelFullScreen();
        }
      }
 
    };
 
    return methods.run.call(this);
 
  }
})(jQuery)