img.img_left{
    float: left;
    margin-right: 5px;
    margin-bottom: 2px;
    border: 1px solid #000;
    padding: 1px;
}
img.img_right{
    float: right;
    margin-bottom: 2px;
    margin-left: 5px;
    border: 1px solid #000;
    padding: 1px;
}
img.img_center{
    margin: 0 auto;
    margin-bottom: 5px;
    margin-top: 5px;
    padding: 1px;
    display: block;
    border: 1px solid #000;
}