Rounded corners for almost all browsers

You need to have the CSS for rounders corners for every HTML element that support border radius.

Here is the code that will work for all browsers.

.rounded-corners {
  -moz-border-radius: 20px;
  -webkit-border-radius: 20px;
  -khtml-border-radius: 20px;
   border-radius: 20px;
}

Source: http://jonraasch.com/blog/css-rounded-corners-in-all-browsers