#modalOverlay {
    width: 100%;
    height: 100%;
    z-index: 2; /* places the modal overlay between the main page and the modal dialog*/
    background-color: #000;
    opacity: 0.5;
    position: fixed;
    top: 0;
    left: 0;
    display: none;
    margin: 0;
    padding: 0;
}

#modal {
    width: auto;
    margin-left: auto;
    margin-right: auto;
    padding: 5px;
    border: thin #000 solid;
    background-color: #fff;
    z-index:10000; /* places the modal dialog on top of everything else */
    position: fixed;
    top: 25%;
    left: 25%;
    display: none;
}

    #modal h1 {
        text-align: center;
    }

.modalCloseButton {
        border-style: none;
    border-color: inherit;
    border-width: medium;
    background: url('/Rsrc/images/closePopup.png') no-repeat left top;
    width:40px;
    float: left;
    position: absolute;
    top: -10px;
    left: -10px;
    height: 40px;
}

    .modalCloseButton img {
        border: 0;
    }

.screen-reader-offscreen {
    position: absolute;
    left: -999px;
    width: 1px;
    height: 1px;
    top: auto;
}