Is there a way to pass case sensitivity together with an argument?

```
   var user = {
  'name' : 'Jim',
  'lastName' : 'Xydas',
  'fullName' : function(){
    return this.name + " " + this.lastName
  },

  'address' : {
    'country' : "Greece",
    'town'    : "Thessaloniki",
    'street'  : "il.ap 15",

    "isFromTown" : function(n){
        return this.town == n ? true : false;
    }
  }
};

var checkUser = user.address.isFromTown("thessaloniki");

console.log(checkUser);

```

What I'm trying to do here is pass the argument as "thessaloniki" and print true, ignoring the first (or more) uppercase letter(s).

<https://jsfiddle.net/DimitriXd4/mfpat7so/>

Thanks in advance.