<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>定义函数</title>
<script type="text/javascript">
function sub2() //定义函数
{
sub=5-2;
alert("5和2的差:"+sub);
}
</script>
</head>
<body>
<form>
<input type="button" value="点击我" onclick="sub2()" />
</form>
</body>
</html>
不带诗情画意
2014-10-27
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