body {
    background-color: #ffffff;
}

#box {
    background-color:#ffffff;
    height:608px;
    width:900px;
    left:50%;
    top:50%;
    margin:0 auto;     
    display: block;
}

#submenu {
    height: 30px;
    width: 900px;
}

a {
    font: bold small sans-serif;
    color: black;
    text-decoration: none;

}

#txt_int {
    position:absolute;
    height: 310px;
    width:670px;
    margin-top: 95px;
    margin-left: 180px;
    z-index: 3;
    padding-right: 10px;
}

#footer {
    position: absolute;
    height: 130px;
    margin-top: 350px;
}