Centering a div block without the width

[netcat-na-diary]

Центрирование блока без фиксированной ширины

HTML

<div class="product_container">
    <div class="outer-center">
        <div class="product inner-center">
        </div>
    </div>
    <div class="clear"></div>
</div>

CSS

.outer-center {
    float: right;
    right: 50%;
    position: relative;
}
.inner-center {
    float: right;
    right: -50%;
    position: relative;
}
.clear {
    clear: both;
}

http://stackoverflow.com/questions/283961/centering-a-div-block-without-the-width