Setting of portrait upon successful login in the Unity3D Facebook integration with Coherent UI sample

facebook_portrait.js

FB.Event.subscribe('auth.statusChange', function(response) {
	if (response.authResponse) {
		// user has auth'd your app and is logged into Facebook
		// request users' first name and profile picture
		FB.api('/me?fields=picture,first_name', function(me){
			SetPortrait(me);
			userID = me.id;
		});
	}
})

function SetPortrait(fbAvatar) {
	var url = fbAvatar.picture.data.url;
	$('#fbButton').css("background-image", "url(" + url + ")"); // #fbButton is a <div>
}