spite

var c = document.body;
document.getElementById( 'fullscreenBtn' ).addEventListener( 'click', function( e ) {
	c.onwebkitfullscreenchange = function(e) {
		c.onwebkitfullscreenchange = function() {
		};
	};
	c.onmozfullscreenchange = function(e) {
		c.onmozfullscreenchange = function() {
		};
	};