function __CreateCookie(name, value, days) {
    var expires = "";
    if(days) {
        var date = new Date();
        date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
        expires = "; expires=" + date.toGMTString();
    }
    else expires = "";
    document.cookie = name + "=" + value + expires + ";";
}

function __ReadCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i = 0; i < ca.length; i++) {
        var c = ca[i];
        while(c.charAt(0) == ' ') c = c.substring(1, c.length);
        if(c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
    }
    return null;
}

function __EraseCookie(name) {
    __CreateCookie(name, "", -1);
}