function handleFullscreen(id){
const userAgent=window.navigator.userAgent;
if(supportsFullscreenAPI()){
goFullscreen(id);
}else{
window.open(document.getElementById(id).src, '_blank');
}}
function goFullscreen(id){
const element=document.getElementById(id);
if(element.requestFullscreen){
element.requestFullscreen();
}else if(element.webkitRequestFullscreen){
element.webkitRequestFullscreen();
}else if(element.mozRequestFullScreen){
element.mozRequestFullScreen();
}else if(element.msRequestFullscreen){
element.msRequestFullscreen();
}}
function supportsFullscreenAPI(){
return (
document.fullscreenEnabled ||
document.webkitFullscreenEnabled ||
document.mozFullScreenEnabled ||
document.msFullscreenEnabled
);
};