div.three
    {
        background-image:url('three.png') no-repeat;
        position:absolute;
        width:313px;
        height:251px;
        margin-left:600px;
        float:right;
    }
div.four
    {
        background-image:url('four.png') no-repeat;
        position:absolute;
        width:289px;
        height:252px;
        margin-left:300px;
        float:left;
    }