HealthGuru?.js This is instanstiated globally as HG

Checking if logged in

 if(HG.isLogged()){
  alert("Username: "+HG.options.username + " whose ID is "+ HG.options.userId + " is Logged IN!");
 }

Logging in ajax way (after an ajax request for login in anyway you did, do this)

 if(HG.login({username:response.username, userId: response.userId })){
  alert("Logged In");
 }