border-radius CSS property.

Values: [ <length> | <percentage> ]{1,4} [ / [ <length> | <percentage> ]{1,4} ]?
Initial value: see individual properties
Applies to: all elements (but see prose)
Inherit: no
Percentages: Refer to corresponding dimension of the border box.
Animatable:
Media: visual
Computed value:

CSS Standards

CSS 1
CSS 2
CSS 2.1
CSS 3
No
No
No
Yes