“absmiddle” is a non-standard value for an images tags align property.
While widely implemented, it isn’t a part of the HTML 4.x spec.

This helpful property caused the image to be shifted down to rest on the same line as elements around it.

Here is a CSS way to make an image have the same settings as the absmiddle property.

IMG.absmiddle {
vertical-align: middle;
margin-bottom: .25em;
}

Thanks to George on code2design.com for this tip.