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??: ??buttonObject.disabled=true|false

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<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()">請點擊我！</button>
</form>
</body>
</html>
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