function RemoveFilteringCookies() {

    var cookieValue = get_cookieFromDocument("FilterSettings");
    var exdate = new Date();
    exdate.setHours(exdate.getHours() - 1);
    document.cookie = "FilterSettings=" + cookieValue + ";expires=" + exdate.toGMTString() + ";path=/";
}

function setFilteringCookies(selectedFilter) {
    RemoveFilteringCookies();
    var exdate = new Date();
    exdate.setHours(exdate.getHours() + 24);
    document.cookie = "FilterSettings=" + selectedFilter + ";expires=" + exdate.toGMTString() + ";path=/";
}

function get_cookieFromDocument(cookie_name) {
    return get_cookie(document.cookie, cookie_name);
}

function get_cookie(cookies, cookie_name) {
    if (cookies == null || cookies == '')
        return null;

    var results = cookies.match('(^|;) ?' + cookie_name + '=([^;]*)(;|$)');

    if (results)
        return (unescape(results[2]));
    else
        return null;
}