Set Facebook iFrame height

gistfile1.js

// 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));

// Set canvas size
window.fbAsyncInit = function() {
	FB.init({
		appId : YOUR_APP_ID_HERE
	});
	FB.Canvas.setSize({
		width: 810,
		height: $('body').height()
	});
}

Thanks :)