function appendAnal() {
	var frame = document.createElement('iframe');
	frame.src="https://www.googletagmanager.com/ns.html?id=GTM-W9XB8Z2";
	frame.height = 0;
	frame.width = 0;
	frame.style = "display:none;visibility:hidden;"
	document.getElementById('analytics-body').appendChild(frame);
}

appendAnal();