jsp全屏

<!DOCTYPE html>
<html>
<head>
    <title>Fullscreen Example</title>
    <script type="text/javascript">
        function toggleFullScreen() {
            var doc = window.document;
            var docEl = doc.documentElement;

            var requestFullScreen = docEl.requestFullscreen || docEl.mozRequestFullScreen || docEl.webkitRequestFullScreen || docEl.msRequestFullscreen;
            var cancelFullScreen = doc.exitFullscreen || doc.mozCancelFullScreen || doc.webkitExitFullscreen || doc.msExitFullscreen;

            if (!doc.fullscreenElement && !doc.mozFullScreenElement && !doc.webkitFullscreenElement && !doc.msFullscreenElement) {
                requestFullScreen.call(docEl);
            } else {
                cancelFullScreen.call(doc);
            }
        }
    </script>
</head>
<body>
    <button onclick="toggleFullScreen()">Toggle Fullscreen</button>
    <h1>Welcome to Fullscreen Mode</h1>
</body>
</html>