border-top-left-radius CSS property.

Values: [ <length> | <percentage> ]{1,2}
Initial value: 0
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