.MessageDialog
{
    background-color: #ffffdd;
    border-width: 3px;
    border-style: solid;
    border-color: Gray;
    padding: 10px;
    width: 400px;
    text-align: center;
}

.MessageDialogBackground
{
    background-color: Gray;
    filter: alpha(opacity=70);
    opacity: 0.7;
}