使用css3制作圆角实例代码

/* set millions of background images */
.rbroundbox { background: url(nt.gif) repeat; }
.rbtop p { background: url(tl.gif) no-repeat top left; }
.rbtop { background: url(tr.gif) no-repeat top right; }
.rbbot p { background: url(bl.gif) no-repeat bottom left; }
.rbbot { background: url(br.gif) no-repeat bottom right; }
/* height and width stuff, width not really nessisary. */
.rbtop p, .rbtop, .rbbot p, .rbbot {
width: 100%;
height: 7px;
font-size: 1px;
}
.rbcontent { margin: 0 7px; }
.rbroundbox { width: 50%; margin: 1em auto; }

<p class="rbroundbox">
<p class="rbtop"><p></p></p>
<p class="rbcontent">
<p>Lorem ipsum dolor sit amet,
consectetuer adipiscing elit. Duis
ornare ultricies libero. Donec
fringilla, eros at dapibus fermentum,
tellus tellus auctor erat, vitae porta
magna libero sed libero. Mauris sed leo.
Aliquam aliquam. Maecenas vestibulum.</p>
</p><!-- /rbcontent -->
<p class="rbbot"><p></p></p>
</p><!-- /rbroundbox -->