Hidden.value : Hidden Object « Form « JavaScript Tutorial

The value property reflects the HTML VALUE attribute of the Hidden object.

<html>
    <head>
    <title> Using the value 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="Get Hidden Value"
       onClick='alert("The Hidden object value is: " + form1.hide1.value)'>
    </form>
    </body>
    </html>

10.20.Hidden Object
	10.20.1.	Hidden
	10.20.2.	Hidden.form
	10.20.3.	Hidden.name
	10.20.4.	Hidden.type
	10.20.5.	Hidden.value