In Mozilla/Firefox, round corner of a object in the page can be easily set with mozilla's CSS extension:
Mozilla Rounded Corners:
-moz-border-radius: ul ur lr ll;
-moz-border-radius: 10% 10% 0 0;
-moz-border-radius: 0 0 100% 100%;
-moz-border-radius: 100%;
-moz-border-radius: 15px 0 15px 0;
Internet Explorer does not support the round corner extension, so IEPro developed a special API for rounded corner in CSS styles.
PRO_roundCorner(selector, [options], [document]);
Please see detail information in section "IEScripts API".