function OpenMessageDialog(url, toUserId, messageId, isFriendshipRequest) {
    var src = url + "?toUserId=" + toUserId;
    if (messageId != null && messageId.toString().length > 0)
        src += "&messageId=" + messageId;
    if (isFriendshipRequest != null)
        src += "&isFriendshipRequest=true";
    showModalDlg(src, '350px', '300px', null, null);
}

function CloseMessageDialog() {
    parent.returnModalValue(-1);
}