"CurvyCorners" to use anti-aliasing on the corner and round it without using images

"CurvyCorners" is free JavaScript, it is possible to easily create round corners with DIV elements. The point is that the corners are rounded as smoothly as using the image, and the point is easy to use.

For examples of downloading and downloading code, see below for how to round it.
Example Using that 1, 3 pixel white border, the corner is rounded with a radius of 20 pixels

Example 2 An example in which the image is fixed with a fixed width and height and the corner is rounded with a radius of 20 pixels

Download it here

See below for usage
http://www.curvycorners.net/

Because it supports most major browsers, it has high versatility and is easy to use.