body {
    text-align: center;
}

.maindiv {
    margin: 0px;
    margin-left: auto;
    margin-right: auto;
    padding: 0px;
    border: 0px solid black;
    width: 802px;
}

.headdiv {
    background-color: #FFFFFF;
    border: 0px solid red;
    width: 802px;
    height: 135px;
    padding: 0px;
    margin: 0px;
}

.headdiv table {
    width: 100%;
}

.contentdiv {
    background-color: #FFFFFF;
    border: 0px solid green;
    width: 762px;
    height: 550px;
    padding: 20px;
    margin: 0px;
    overflow: auto;
    text-align: left;
}

.bottomdiv {
    border: 0px solid grey;
    width: 802px;
    height: 30px;
    padding: 0px;
    margin: 0px;
    background-color: #FFFFFF;
}