<style type="text/css">
  div{
    border:2px solid black;
    background-color:#DFDFDF;
    margin:4px;
    width:100px;
    height:40px;
  }
  #w1{
    float:left;
  }
  #w2{
    float:right;
  }
  #w3{
    float:left;
  }
</style>
