HTML DOM id ÊôÐÔ
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buttonObject.id=id
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<html>
<head>
<script type="text/javascript">
function alertId()
{
alert(document.getElementById("myButton").id
)
}
</script>
</head>
<body>
<form>
<input type="button" value="Click me!" id="myButton"
onclick="alertId()" />
</form>
</body>
</html>