The type property specifies the hidden type.
For all Hidden objects, the type value is Hidden.
<html>
<head>
<title> Using the type property of the Hidden object</title>
</head>
<body>
<form name="form1">
Form name:<input type="hidden" name="hide1" value="Test">
<P>
<input type="button" value="Hidden Type"
onClick='alert("The Hidden object type is: " + form1.hide1.type)'>
</form>
</body>
</html>