function onlyNumbers(evt) {
    var e = evt;
    var charCode;
    var rc = false;

    if (window.event) { // IE
        charCode = e.keyCode;
    } else if (e.which) { // Safari 4, Firefox 3.0.4
        charCode = e.which;
    }
    if (charCode > 31 && (charCode < 48 || charCode > 57)) {
        rc = false;
    }
    else {
        rc = true;
    }
    return rc;
}

function setCookie2(name, value, set, days) {
    var cookie_date = new Date();
    cookie_date.setDate(cookie_date.getDate() + ((set == true ? days : -1)));
    var new_cookie = name + '=' + value + '; path=/; expires=' + cookie_date.toGMTString();
    document.cookie = new_cookie;
}