body {    font-size: small;
}
    .modal
{
    position: fixed;
    z-index: 999;
    height: 100%;
    width: 150%;
    top: -516px;
    left: -1481px;
    background-color:none;
    filter: alpha(opacity=60);
    opacity: 0.6;
    -moz-opacity: 0.8;
}
.center
{
    z-index: 1000;
    margin: 300px auto;
    padding: 10px;
    width: 120px;
    background-color: White;
    border-radius: 10px;
    filter: alpha(opacity=100);
    opacity: 1;
    -moz-opacity: 1;
}
.center img
{
    height: 128px;
    width: 128px;
}
.btn-back {
    background-image: url(../image/arrow-back-icon.png);
    background-size: 150px 150px;
   background-repeat: no-repeat;
    border: medium none;
    bottom: 20px;
    cursor: pointer;
    display: none;
    height: 150px;
    outline: medium none;
    padding: 0;
    position: fixed;
    right: 00px;
    width: 150px;
    z-index: 9999;
    
}