Daring Fireball URL Regex Matcher for JavaScript

url_matcher.js

function urlMatcher () {
    //
    // See: http://daringfireball.net
    //      /2010/07/improved_regex_for_matching_urls
    //
    return (new RegExp(
        "\\b((?:https?://|www\\d{0,3}[\\.]|" +
        "[a-z0-9\\.-]+[\\.][a-z]{2,4}/)" +
        "(?:[^\\s()<>]+|\\(([^\\s()<>]+|(\\([^\\s()<>]+\\)))*\\))+" +
        "(?:\\(([^\\s()<>]+|(\\([^\\s()<>]+\\)))*\\)|[^\\s`!()" +
        "\\[\\]{};:'\"\\.,<>?\u00AB\u00BB\u201C\u201D\u2018\u2019]))", "i"
    ));
}