#main {
    width: 1000px;
    min-height: 100px;
    overflow: hidden;
    display: block;
}
#divUno {
    width: 70%;
    float:left;
    overflow: auto;
    display: block;
}
#divDue {
    width: 30%;
    float: left;
    overflow: auto;
    display: block;
}
#divTre {
    width: 100%;
    clear:both;
    overflow: auto;
    display: block;
} 
#divQuattro {
    width: 50%;
    float:left;
    overflow: auto;
    display: block;
}
#divCinque {
    width: 50%;
    float:left;
    overflow: auto;
    display: block;
}
#divSei {
    width: 35%;
    float:left;
    overflow: auto;
    display: block;
}
#divSette {
    width: 30%;
    float:left;
    overflow: auto;
    display: block;
}
#divOtto {
    width: 30%;
    float:left;
    overflow: auto;
    display: block;
}
#divNove {
    width: 100%;
    clear:both;
    overflow: auto;
    display: block;
}