div.billboard{
width:1000px;
margin-left:auto;
margin-right:auto;
margin-top:10px;
margin-bottom:10px;
    text-align:center;

}

div.billboard div{
    text-align:center;
}

div.billboard table{
    margin: 0 auto;
}

div.ad1{
width:100%;
float:left;
margin-top:10px;
text-align: center;
}

div.ad1 div{
    text-align: center;
}

div.ad1 div table{
    margin: 0 auto;
}

div.ad2{
width:298px;
}

div.ad3{
width:298px;
min-height:66px;
margin-left:auto;
margin-right:auto;
margin-bottom:5px;
}

div.ad4{
width:298px;
margin-left:auto;
margin-right:auto;
}

div.ad5{
width:158px;
max-height:598px;
float:left;
}

div.ad6{
width:750px;
max-height:100px;
float:left;
margin-top:10px;
}

div.ad7{
width:298px;
min-height:66px;
margin-left:auto;
margin-right:auto;
margin-bottom:5px;
}