function SetLang() {
    var newLang = "pt";

    var oldCookie = document.cookie;
    var newCookie = "";
    var crumbs = oldCookie.split(";");

    var oldQueryParams = "";
    var newQueryParams = "";
    var indexOfQueryParams = -1;

    var startLang = -1;
    var endLang = -1;

    for (i = 0; i < crumbs.length; i++) {
        if (crumbs[i].indexOf("queryParams") != -1) {
            oldQueryParams = crumbs[i];
            indexOfQueryParams = i;
            break;
        }
    }

    startLang = oldQueryParams.indexOf("lang**") + 6;
    endLang = oldQueryParams.indexOf("lang**") + 8;

    if (indexOfQueryParams == -1) {
        newQueryParams += "lang**" + newLang + "__";
    }
    else {
        newQueryParams += oldQueryParams.substring(0, startLang) + newLang + oldQueryParams.substring(endLang, oldQueryParams.length);
    }

    document.cookie = "queryParams=" + newQueryParams;
}