<!DOCTYPE html>
<html>
<head>
<title>Rounded rectangle clipping test</title>
<style>
.clipround {
  left:100px;
  top:100px;
  position:absolute;
  width:700px;
  height:380px;
  overflow:hidden;
  border-radius:45px;
}
.greendiv {
  width:300px;
  height:230px;
  background-color:#00ff00;
  position:absolute;
}
#nrcDiv0 {
  left:0px;
  top:0px;
}
#nrcDiv1 {
  left:320px;
  top:0px;
}
#nrcDiv2 {
  left:0px;
  top:240px;
}
</style>
</head>

<body>
<div class="clipround">
<div id="nrcDiv0" class="greendiv"></div>
</div>
<div class="clipround">
<div id="nrcDiv1" class="greendiv"></div>
</div>
<div class="clipround">
<div id="nrcDiv2" class="greendiv"></div>
</div>
</body>
</html>