css 圆角边框

<div class="box">
<div class="box-outer">
<div class="box-inner">
<h2>Header</h2>
<p>Content</p>
</div>
</div>
</div>

.box {
width: 20em;
background: url(images/buttomleft.gif) no-repeat
bottom left;
}
.box-outer {
background: url(images/buttomright.gif) no-repeat
bottom right;
}
.box-inner {
background: url(images/left.gif) no-repeat
left;
}
.box h2 {
background: url(images/right.gif) no-repeat
right;
}
.box h2 {
padding: 20px 0 0 20px;
margin: 0;
}
.box p {
padding: 10px 20px 20px 20px;
margin: 0;
}