function update_user_box() { 
	var user_box = document.getElementById("user"); 
	// add in some XFBML. note that we set useyou=false so it doesn't display "you" 
	user_box.innerHTML = "<span>" + "<fb:profile-pic uid='loggedinuser' facebook-logo='true'></fb:profile-pic>"+
	"Welcome, <fb:name uid='loggedinuser' useyou='false'></fb:name>. You are signed in with your Facebook account." + "</span>"; 
	// because this is XFBML, we need to tell Facebook to re-process the document 
	FB.XFBML.Host.parseDomTree(); 
	}