#box1
ingen positionering.
#box2
ingen positionering.

body {
margin: 0;
padding: 0;
}

#box1 {
background-color: #cccc99;
width: 300px;
padding: 10px;
}

#box2 {
background-color: #ffff66;
width: 300px;
padding: 10px;
}