How to implement rounded corners with CSS3 using JS

How to implement rounded corners with CSS3 using JS 
I found an example when I was looking for a way to achieve rounded corners with CSS3 in IE. I haven't tested it yet, so I don't know how it works. If you're interested, you can try it yourself:
 Copy code
 The code is as follows:
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"><head>
<title>Online Demo - LHGCALENDAR</title>
<script type="text/javascript" src="http://www.qiuzhiquan.com/images/DD_roundies_min.js"></script>
<script type="text/javascript">
DD_roundies.addRule('.websjy1', '5px 20px 3px 10px', true);DD_roundies.addRule('.websjy2', '5px', true);DD_roundies.addRule('.websjy3', '1000px', true);
</script>
<body>
<h3>Effect 1</h3>
<div style="border:1px solid #CCCCCC; width:200px; height:200px; background:#66FFFF; margin-bottom:10px;" class="websjy1">32423</div>
<h3>Effect 2</h3>
<div style="border:1px solid #CCCCCC; width:200px; height:200px; background:#EEE; margin-bottom:10px;" class="websjy2">32423</div>
<h3>Effect 3</h3>
<div style="border:1px solid #CCCCCC; width:200px; height:200px; background:#ff0000; margin-bottom:10px;" class="websjy3">32423</div>
</body>
</html>
 Preview effect: http://www.websjy.com/club/websjy_index/53/

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