Question

HOW TO EXECUTE FULLSCREEN / F11 USING JAVA SCRIPT ON LOADEVENT

Answer 1

function launchFullScreen() {
if(document.documentElement.requestFullScreen) {
document.documentElement.requestFullScreen();
} else if(document.documentElement.mozRequestFullScreen) {
document.documentElement.mozRequestFullScreen();
} else if(document.documentElement.webkitRequestFullScreen) {
document.documentElement.webkitRequestFullScreen();
}
}

But browsers actually do not allow this to happen in onload, so instead you can do this on any user click.
window.onclick = launchFullScreen;