#container{
height: 15em;
width: 100%;
}

#center{
background-color: #CCC;
height: 15em;
width: 70%;
float: left;
clear: none;
}

#container_right{
float: left;
width: 30%;
}

#right_up{
background-color:#999;
height: 12em;
width: 100%;
clear: both;
}

#right_down{
background-color: #666;
height: 3em;
width: 100%;
}