4.请问,圆角边框代码css样式怎么写直接复制过去用就可以了，Testing Rounded Corners without images & javascriptby Gene 。
5.求以下HTML代码圆角写法【圆角代码怎么写】<meta http-equiv="Content-Type" content="text/HTML; charset=gbk" />div+CSS圆角矩形<style type="text/CSS">body{padding: 20px;background-color: #FFF;font: 100.01% "Trebuchet MS",Verdana,Arial,sans-serif}div#nifty{ margin: 0 10%;background: #9BD1FA}p {padding:10px}div.rtop, div.rbottom{display:block;background: #FFF}div.rtop div, div.rbottom div{display:block;height: 1px;overflow: hidden; background: #9BD1FA}div.r1{margin: 0 5px}div.r2{margin: 0 3px}div.r3{margin: 0 2px}div.rtop div.r4, div.rbottom div.r4{margin: 0 1px;height: 2px}</style><body>nino