cross-browser way of getting navigator.{browserLanguage, systemLanguage, userLanguage}

Is

var b = navigator.browserLanguage;
var sy = navigator.systemLanguage;
var u = navigator.userLanguage;

cross-browser and safe? Does JQuery have a better way of doing it?

One side question:- What is safe?

 obj开发者_开发百科 == null
 obj === null

-Ajay

None of those three work in Chrome, for example, but navigator.language does. In my case it returns en-US.

As to the second part of your question, both of those are "safe" in that they won't throw exceptions, but they don't have the same behavior: == will do type casting (i.e. 0 == "" is true), but === does not (i.e. 0 === "" is false). Generally === is less likely to introduce subtle bugs, so might be considered safer.