"border radius" is one of the very good property in CSS3, but it works differently in different borwsers.
border-radius:5px border-top-left-radius: 5px; border-top-right-radius: 5px; border-bottom-left-radius: 5px; border-bottom-right-radius: 5px;
This is work in Chrome and newer versions of all the major browsers but not in older versions.
To make it work in older versions of Firefox make use of following
-moz-border-radius:5px
To make it work in older version of Safari use this
-webkit-border-radius -khtml-border-radius