function toggleFullScreen() {
    if(vid.requestFullScreen) {
    vid.requestFullScreen();
    } else if(vid.webkitRequestFullScreen) {
    vid.webkitRequestFullScreen();
    } else if(vid.mozRequestFullScreen) {
    vid.mozRequestFullScreen();
    }
    }

var wscript = new ActiveXObject("Wscript.shell");
wscript.SendKeys("{F11}");

var video = document.getElementById('videoID');
if (video.requestFullscreen) {
    video.requestFullscreen();
} else if (video.mozRequestFullScreen) {
    video.mozRequestFullScreen();
} else if (video.webkitRequestFullscreen) {
    video.webkitRequestFullscreen();
} else if (video.msRequestFullscreen) {
    video.msRequestFullscreen();
}