FullScreen

HTML

<div id='tt'> Full SCreen Me</div>
<div> This example must be copied into its own page. Full screen does not work from JSFiddle.</div>

JavaScript

function toggleFullScreen() {
    if ((document.fullScreenElement && document.fullScreenElement == '#tt') || // alternative standard method  
    (!document.mozFullScreen && !document.webkitIsFullScreen)) { // current working methods  
        if (document.documentElement.requestFullScreen) {
            document.documentElement.requestFullScreen();
        } else if (document.documentElement.mozRequestFullScreen) {
            document.documentElement.mozRequestFullScreen();
        } else if (document.documentElement.webkitRequestFullScreen) {
            document.documentElement.webkitRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT);
        }
    } else {
        if (document.cancelFullScreen) {
            document.cancelFullScreen();
        } else if (document.mozCancelFullScreen) {
            document.mozCancelFullScreen();
        } else if (document.webkitCancelFullScreen) {
            document.webkitCancelFullScreen();
        }
    }
}

$("body").click(function() {
    toggleFullScreen();
});