Changing Javascript prompts according to Locale

Hello,

In an application, the user selects language in the login page itself, so the interface is loaded in selected language using ResourceBundle. But the Javascript file is consistent, and manually changing seems impossible. The JS prompts messages in English language and I want it to show message in user-selected language. How can I accomplish this? Is there any way, I can do a check before alerting when a particular JS function is called?

I think I can take field labels from the page itself For example "comment can not be null". "comment" is field label, it will be translated, but what about "can not be null"?

Wouldn't it be easier to have one Javascript file for each language you support, and just have the page download the Javascript version for the language which the user selected?

Or better yet, have a JS file for each language that only contains a translation table for the text. That way, no code need be repeated.

(Or use Ajax to load such a table.)

Hi,
For JS, there is only one file, and I can get the language from some class and then display proper prompts after checking the language, because having different JS files, I think will build up the work.
Now I do not know how to call the java method from the JS file, and determine the language. Please help me.

Update: I have specified seperate file name in a JSP thats included with every other JSP, and there I can get the language simply there.

But please explain me this:

Bear wrote: Or better yet, have a JS file for each language that only contains a translation table for the text