javascript火狐全屏并隐藏鼠标

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javascript火狐全屏并隐藏鼠标

window.onload=function(){
    var instructions = document.getElementById('button');
    var havePointerLock = 'pointerLockElement' in document || 'mozPointerLockElement' in document || 'webkitPointerLockElement' in document;
    if ( havePointerLock ) {
        var element = document.body;
        instructions.addEventListener( 'click', function ( event ) {
            element.requestPointerLock = element.requestPointerLock || element.mozRequestPointerLock || element.webkitRequestPointerLock;
            if ( /Firefox/i.test( navigator.userAgent ) ) {
                var fullscreenchange = function ( event ) {
                    if ( document.fullscreenElement === element || document.mozFullscreenElement === element || document.mozFullScreenElement === element ) {
                        document.removeEventListener( 'fullscreenchange', fullscreenchange );
                        document.removeEventListener( 'mozfullscreenchange', fullscreenchange );
                        element.requestPointerLock();
                    }
                }
                document.addEventListener( 'fullscreenchange', fullscreenchange, false );
                document.addEventListener( 'mozfullscreenchange', fullscreenchange, false );
                element.requestFullscreen = element.requestFullscreen || element.mozRequestFullscreen || element.mozRequestFullScreen || element.webkitRequestFullscreen;
                element.requestFullscreen();
            } else {
                element.requestPointerLock();
            }
        }, false );
    } else {
        alert('Your browser doesn\'t seem to support Pointer Lock API');
    }
}