.divMessageBoxHolder {
    display: none;
    top: 0px;
    left: 0px;
    position: fixed;
    height: 100%;
    width: 100%;
    background-color: rgba(0,0,0,0.4);
    z-index:1100;
}

.divMessageBox {
    position: relative;
    display: block;
    margin: 150px auto;
    width: 400px;
    padding: 15px;
    border: 1px solid black;
    box-shadow: 0px 0px 10px 3px black;
    background-color: white;
    border-radius: 10px;
}

    .divMessageBox .Header {
        font-weight: bold;
        margin-top: 0px;
    }

    .divMessageBox .Content {
    }

    .divMessageBox .Controls {
        display: inline-block;
        width: 100%;
        margin-top: 30px;
    }

        .divMessageBox .Controls input {
            width: 100px;
            color: black;
            border: 1px solid black;
        }

            .divMessageBox .Controls input:first-child {
                float: left;
            }

        .divMessageBox .Controls input {
            float: right;
        }