fieldset {
    border-color: #C9DCA6;
    background-color: #F8FDEF;
}
span {
    margin-left: 10px;
}
#my_container {
    border: 1px solid #C9DCA6;
    background-color: #F8FDEF;
    padding: 20px;
}
#overlay {
    z-index:999;
    position:absolute;
    top:0;
    left:0;
    width:100%;
    height: 100%;
    background:#000;
    opacity:0.45;
    -moz-opacity:0.45;
    filter:alpha(opacity=45);
    visibility:hidden;
}

#overlay div {
    z-index:1000;
    margin: 150px auto;
    width: 200px;
    height: 150px;
    background:#000;
    display:block;
}