Forces all links, images, forms and anything that you input text to submit in (except textareas) to be centered. Use this anywhere except for a bunch of damned button forms are put in a list and you want the buttons to line up. I suggest installing as a script so you can arbitrate where it applies more flexibly.
.ad {
/* Your ad can be here instead. 10K unique visitors for $5/day. Mail me. */
}