Cross browser border radius

You can give any element "rounded corners" by applying a border-radius through CSS. You'll only notice if there is a color change involved. For instance, if the element has a background-color or border that is different than the element it's over. Simple examples:

CSS
#example-one {
  border-radius: 10px;
  background: #BADA55;
}
#example-two {
  border-radius: 10px;
  border: 3px solid #BADA55;
}

For the best browser support, you should prefix with -webkit- and -moz-:

CSS
.round {

  /* Safari 3-4, iOS 1-3.2, Android 1.6- */
  -webkit-border-radius: 12px; 

  /* Firefox 1-3.6 */
  -moz-border-radius:    12px; 
  
  /* Opera 10.5, IE 9, Safari 5, Chrome, Firefox 4, iOS 4, Android 2.1+ */
  border-radius: 12px; 
}