#nav
{
float: left;
width: 160px;
}
#extra
{
clear: left;
float: left;
width: 160px;
}
#extra1
{
clear: left;
float: left;
width: 160px;
}
#extra2
{
clear: left;
float: left;
width: 160px;
}
#content
{
margin: 0 0 0 180px;
}
#footer
{
clear: both;
}