<html>
<head>
<script type="text/javascript">
function dianji(txt)
{
alert(txt);
}
</script>
</head>
<body>
<form>
<input type="button" onclick="dianji('早安')" value="早上好">
<input type="button" onclick="dianji('晚安')" value="晚上好">
</form>
<p>通过点击这个按钮,可以调用一个函数。该函数会输出传递它的参数。</p>
</body>
</html>