程式碼：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf8">
<title>hi</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/2.0.3/jquery.min.js"></script>
<script type="text/javascript">
function myClick () {
var myText = $('#demo');
//更改id
myText[0].id = "id";
//更改name
myText[0].name = "name";
}
</script>
</head>
<body>
<input type="text" id="demo" name="demo">
<button onclick="myClick();">Change</button>
</body>
</html>
執行前：
執行後：
