百度有啊 CSS圆角实现代码

.box1 {
background:url(images/bg1.gif) repeat-x #1d6cb7;
margin-top:1em;
position:relative;
zoom:1;
width:778px;
}
.box1 .tl, .box1 .tr, .box1 .bl, .box1 .br {
width:5px;
height:5px;
position:absolute;
background:url(images/bg3.gif) no-repeat;
overflow:hidden;
}
.box1 .cc {
height:40px;
padding:5px;
}
.box1 .tl {
left:0;
top:0;
}
.box1 .tr {
right:0;
top:0;
background-position:0 -5px;
}
.box1 .bl {
left:0;
bottom:0;
background-position:0 -10px;
}
.box1 .br {
right:0;
bottom:0;
background-position:0 -15px;
}