Question

I’m new at using Javascript regexp and after several failed attempts I’m still wondering how to check if an URL starts with http://www.google.fr

Answer 1

var url = "http://www.google.fr";
if(url.match(/^http:\/\/www\.google\.fr/))
    alert("It matches!");

But you might want to allow more variations of the address, and it’s also important to check that what follows it is something valid, so you don’t match things like http://www.google.fr-h4xx0r.com

Eg: /^http:\/\/(?:www\.)?google\.fr(?=\/|$)/i