Set a locale in JavaScript

jQuery tests the validity of a date via:

!/Invalid|NaN/.test(new Date(value))

new Date(dateString) is the same as Date.parse(dateString) and uses browser/OS locale to parse the string.

I'm trying to parse DD/MM/YYYY but I get an error because my browser is looking for MM/DD/YYYY. Since my product will be used only by DD/MM people, I want to force this behaviour.

I could write a custom validator, but is it possible to change the browser locale via JavaScript as well?