img.post_img_centre, img.post_img_left, img.post_img_right {
    padding: 0px;
    border: 0px solid #fff;
    background: #aaa;
    }
img.post_img_centre {
    margin: 0 auto 5px auto;
    }
img.post_img_left {
    float:left;
    margin: 0 10px 5px 0;
    }
img.post_img_right {
    float:right;
    margin: 0 0 5px 10px;
    }