#imgviewer_opacity_bg{
    display: none;

    top: 0; left: 0; bottom: 0; right: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    position: fixed;
    padding: 0px;

    opacity: 0.9;
    background-color: #333;
}

#imgviewer_page{
    display: none;

    top: 0; left: 0; bottom: 0; right: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    position: fixed;
    padding: 0px;

    text-align: center;
}

#imgviewer_img_container{
    display: block;
    position: relative;

    width: 90%;
    height: 90%;
    z-index: 1005;

    margin-left:5%;
    margin-top:1%;

    /*background-color: blue;*/
}

#imgviewer_img_container img{
    vertical-align: middle;

    max-width: 100%;
    max-height: 100%;
    /*background-color:#ffffff;*/
    margin: auto;
    position: absolute;
    top: 0; left: 0; bottom: 0; right: 0;
}

#imgviewer_page button{
    margin-top: 5px;
    position: absolute;
    right : 10%;
}