​x
 
<html>
<head>
<script type="text/javascript">
function alertId()
{
var txt="Id: " + document.getElementById("myButton").id
txt=txt + ", type: " + document.getElementById("myButton").type
alert(txt)
document.getElementById("myButton").disabled=true
}
</script>
</head>
​
<body>
<form>
<button id="myButton" onClick="alertId()">请点击我！</button>
</form>
</body>
​
</html>
​