Convert an image to grayscale in HTML/CSS

Question

Is there a simple way to display a color bitmap in grayscale with just HTML/CSS?

It doesn\'t need to be IE-compatible (and I imagine it won\'t be) -- if

Answer 1

Doesn't look like it's possible (yet), even with CSS3 or proprietary -webkit- or -moz- CSS properties.

However, I did find this post from last June that used SVG filters on HTML. Not available in any current browser (the demo hinted at a custom WebKit build), but very impressive as a proof of concept.