JavaScript生成指定范围随机数的实现方法

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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>生成随机数</title>
</head>
<body>
<input type="text" id="num"> <input type="button" onClick="setRnd()" value="生成5-10之间的随机数">
<script type="text/javascript">
function rnd(min, max){
  return min + Math.floor(Math.random() * (max - min + 1));
}
function setRnd(){
  document.getElementById("num").value = rnd(5,10);
}
</script>
</body>
</html>