CSS: how to vertically and horizontally align an image?

Question

My page has space for an image that can be, say, a maximum 100x100 image. Users can upload any image dimension and the web application will resize it, maintaining aspect rat

Answer 1

You could try this:

.image_container {
    display:table-cell;
    overflow:hidden;
    text-align:center;
    vertical-align:middle;
}
.image_container img {
    vertical-align:baseline;
}

Not 100% sure on browser compatibility, but should get you started in the right direction. Example: http://jsfiddle.net/fJtwX/1/