FB_AsyncInitCode.js

FB Async Init Code

<div id="fb-root"></div>
<script>
	window.fbAsyncInit = function() {
		FB.init({
			appId: 'FBAPPID', // App ID
			status: true, // check login status
			cookie: true, // enable cookies to allow the server to access the session
			xfbml: true  // parse XFBML
		});

		// Additional initialization code here
		FB.Canvas.setAutoGrow();

		// Uncomment if you want the page to scroll up
		//FB.Canvas.scrollTo(0, 0);
	};

	// Load the SDK Asynchronously
	(function(d) {
		var js, id = 'facebook-jssdk', ref = d.getElementsByTagName('script')[0];
		if (d.getElementById(id)) { return; }
		js = d.createElement('script'); js.id = id; js.async = true;
		js.src = "//connect.facebook.net/en_US/all.js";
		ref.parentNode.insertBefore(js, ref);
	} (document));
</script>