img.floatLeft {
    float: left;
    margin-right: 20px;
}

img.floatRight {
    float: right;
    margin-left: 20px;
}

img.marginTop {
    margin-top: 20px;
}

img.marginBottom {
    margin-bottom: 20px;
}

img.halfWidth {
    width: 50%;
}