JavaScript DHTML/Node Operation/specified
"specified" Example
<html>
<body>
<button id="myButton"
onclick="alert(this.attributes["id"].specified);">
Specified Attributes
</button>
</body>
</html>
<html>
<body>
<button id="myButton"
onclick="alert(this.attributes["id"].specified);">
Specified Attributes
</button>
</body>
</html>