Excellent browser support.
It was part of the CSS1 spec and has been around forever, and was always easy enough to implement that browsers appear to have gotten it right on the first try.
At the very least (from personal experience) IE5.5+, Firefox 1+, Safari 3+, Chrome 1+.
Pretty much supported by every browser that supports CSS (which is every browser you care about).
与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
