function replace_i18n(obj, tag, param1) {
    var msg = tag.replace(/__MSG_(\w+)__/g, function (match, v1) {
        return v1 ? chrome.i18n.getMessage(v1, param1) : "";
    });
    if (msg != tag) obj.innerHTML = msg;
}

function localizeHtmlPage() {
    // Localize using __MSG_***__ data tags
    var data = document.querySelectorAll("[data-localize]");

    for (var i in data)
        if (data.hasOwnProperty(i)) {
            var obj = data[i];
            var tag = obj.getAttribute("data-localize");
            var param1 = obj.getAttribute("data-param1");
            replace_i18n(obj, tag, param1);
        }

    // Localize everything else by replacing all __MSG_***__ tags
    var page = document.getElementsByTagName("html");

    for (var j = 0; j < page.length; j++) {
        var obj = page[j];
        var tag = obj.innerHTML.toString();

        replace_i18n(obj, tag);
    }
}

localizeHtmlPage();