if (screen.width < 480) {
	document.getElementById("viewport").content = "width=device-width,initial-scale=" + (screen.width / 480);
}

window.addEventListener("orientationchange", function() {
	if (screen.width < 480) {
		document.getElementById("viewport").content = "width=480";
	} else {
		document.getElementById("viewport").content = "width=device-width";
	}
});