var paramKey = "";
if (typeof(key) != 'undefined') {
    paramKey = "&key=" + key;
}

var paramBypass = "";
if (typeof(bypassTracking) != 'undefined') {
    paramBypass = "&bypassTracking=true";
}

var paramUser = "";
if (typeof(user) != 'undefined') {
    paramUser = "&user=" + user;
}

var paramHost = "http://www.updown.com";
if (typeof(host) != 'undefined') {
    paramHost = host;
}

document.write("<iframe src='" + paramHost + "/widget.do?id=" + id + "&type=" + type + paramKey + paramBypass + paramUser + "' width='" + width + "' height='" + height + "' frameborder='0'></iframe>");