snippet - full screen..

gistfile1.js

var FullScreen = FullScreen || {};

FullScreen.Class = (function(){

    var docElm = document.documentElement;
    var imgUm = document.getElementById('img-um'); 
    var botaoSair = document.getElementById('btn-sair'); 
    var imgDois = document.getElementById('img-dois'); 

    var oFs = { 
        requestFullScreen: (function( el ) {
            if ( docElm.requestFullscreen ) {
                el.requestFullscreen();
            } else if ( docElm.mozRequestFullScreen ) {
                el.mozRequestFullScreen();
            } else if ( docElm.webkitRequestFullScreen ) {
                el.webkitRequestFullScreen();
            }
    
        }),
        cancelFullScreen: (function( el ) {
            if ( document.exitFullscreen ) {
                document.exitFullscreen();
            } else if ( document.mozCancelFullScreen ) {
                document.mozCancelFullScreen();
            } else if ( document.webkitCancelFullScreen ) {
                document.webkitCancelFullScreen();
            }   
        }),
        addEventos: (function() {
            imgUm.addEventListener('click', function() {
                oFs.requestFullScreen(this);
            },false);

            botaoSair.addEventListener('click', function( evt ) {
                evt.cancelBubble = true;
                oFs.cancelFullScreen(document);
            },false);

            imgDois.addEventListener('click', function() {
                oFs.requestFullScreen(this);
            },false);
        })
    };
    return oFs.addEventos();
}( FullScreen.Class ));​