// trida pro praci s cookies
var MyCookie = {
    Write:function(name,value,days) {
        var D = new Date();
        D.setTime(D.getTime()+86400000*days)
        document.cookie = escape(name)+"="+escape(value)+
            ((days == null)?"":(";expires="+D.toGMTString()))
        return (this.Read(name) == value);
    },
    Read:function(name) {
        var EN=escape(name)
        var F=' '+document.cookie+';', S=F.indexOf(' '+EN);
        return S==-1 ? null : unescape(F.substring(EN=S+EN.length+2,F.indexOf(';',EN)) );
    }
}