html, body 
{
background-color: #fff;
color: #000;
margin: 10%;
padding: 0;
text-align: center;
}
#top 
{
width: 780px;
margin-left: auto;
margin-right: auto;

}

#mid
{
background-color: #60F;
}

#left
{
width: 150px;
float: left;
overflow: hidden;
background-color: #0FF;
}

#right
{
width: 150px;
float: right;
overflow: hidden;
background-color: #0FF;
}

#midlane
{
background-color: #0F6;
}

#bot
{
clear: both;
width: 100%;
background-color: #60F;
}