function createCookie(name, value, mins) {
    if (mins) {
        var date = new Date();
        date.setTime(date.getTime() + (mins*60*1000));
        var expires = "; expires=" + date.toGMTString();
    }
    else
        var expires = "";
    document.cookie = name + "=" + value + expires + "; path=/";
}