crop css

#cropBl
{
    width: 200px;
    height: 250px;
    border: 2px dashed white;
    border-radius: 5px;
    position: fixed;
    z-index: 2;
    top: 10px;
    margin: 0 auto;
    left: 0;
    right: 0;
    background-color: black;
    opacity: 0.6;
    display: none;
}

#imgPreview
{
    position: fixed;
    z-index: 2;
    margin: 10px auto;
    top: 10px;
    left: 0;
    right: 0;
}