<a href="#" onclick="al()">保存</a>
<html>
<head>
<script>
function al()
{
alert("good");
}
</script>
</head>
<body>
<a href="#" onclick="al()">保存</a>
</body>
</html>
<a id="a1" href="#">保存</a>
<script>
document.getElementById("a1").onclick=function(){}
</script>
