下面是整个页面的源码，复制->粘贴->保存成html文档->可见效果：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>CSS+DIV圆角</title><style type="text/css">#divcss5 {background: transparent; margin:1em;}/*圆角样式 */.xtop, .xbottom {display:block; background:transparent; font-size:1px;}.xb1, .xb2, .xb3, .xb4 {display:block; overflow:hidden;}.xb1, .xb2, .xb3 {height:1px;}.xb2, .xb3, .xb4 {background:#FCC; border-left:1px solid #F69; border-right:1px solid #F69;}.xb1 {margin:0 5px; background:#F69;}.xb2 {margin:0 3px; border-width:0 2px;}.xb3 {margin:0 2px;}.xb4 {height:2px; margin:0 1px;}.xboxcontent {display:block; background: #FCC; border:0 solid #F69; border-width:0 1px;}/*圆角样式 */</style></head><body><div id="divcss5"><b class="xtop"><b class="xb1"></b><b class="xb2"></b><b class="xb3"></b><b class="xb4"></b></b><div class="xboxcontent" align="center" style="color:#FF0"><b>div + css圆角，无需图片</b></div><b class="xbottom"><b class="xb4"></b><b class="xb3"></b><b class="xb2"></b><b class="xb1"></b></b></div></body></html>
