The property border-radius can be used to frame to be provided with rounded corners. The radius is also applied to backgrounds and shadow effects, even if the element has no frame.
border-radius is short for for properties border-top-left-radius, border-top-right-radius, border-bottom-right-radius and border-bottom-left-radius.
It is necessary to distinguish between various cases of desired angles, according to the four angles, and whether the radius of the angles are equal or different.
All radius are the same.
{{border radius | value with unit of measure}}
All radii are different.
{{border radius | radius1 radius2 radius3 radius4}}
It has only one binding parameter, but it can contain one, two, three, or four corner indications (according to CSS manuals).
Do not use two or three values, as this will result in a different display of the different browsers.
border-radius: <length-percentage> { 1,4 } [ / <length-percentage> { 1,4 } ] ? in which <length-percentage> = <length> | <percentage> respectively. border-radius: [<length> | <Percentage>] {1.4} [/ [<Length> | <Percentage>] {1.4}]?