Background blur with CSS

Question

I want an Vista/7-aero-glass-style effect on a popup on my site, and it needs to be dynamic. I\'m fine with this not being a cross-browser effect as long as

Answer 1

You can use a pseudo-element to position as the background of the content with the same image as the background, but blurred with the new CSS3 filter.

You can see it in action here: http://codepen.io/jiserra/pen/JzKpx

I made that for customizing a select, but I added the blur background effect.