OBJECT:
Hidden
A
Hidden object provides a text object on a form that is
hidden from the user and is created with every instance of an HTML <INPUT>
tag with the type attribute set to 'hidden'. A Hidden object is
used to pass name/value pairs when the form is submitted. These objects
are then stored in the elements array of the parent form and accessed
using either the name defined within the HTML tag or an integer (with
'0' being the first element defined, in source order, in the specified
form).
The following example creates a button that, when clicked, displays the
Hidden object's value in an alert box.
Code:
<form action="" method="POST" id="myForm">
<input type="Hidden" name="objHidden" value="" id="objHidden">
<input type="Button" name="" value="Get hidden value" id="myButton"
onClick=getHidden()>
<script type="" language="JavaScript">
myForm.objHidden.value=("Hidden object example")
function getHidden() {
y=myForm.objHidden.value
self.alert("The Hidden object's value is : "
+ y)
}
</script> </form>
PROPERTIES
form Property
This property returns a reference to the parent Form of the Hidden
object.
Syntax: object.form
name Property
This property sets or returns the value of the Hidden object's
name attribute.
Syntax: object.name
type Property
Every element on a form has an associated type property. In the
case of a Hidden object, the value of this property is always "hidden".
Syntax: object.type
value Property
This property sets or returns the Hidden object's value
attribute. This is the text that is held in the Hidden
object until the form is submitted.
Syntax: object.value
METHODS
The Hidden object inherits the watch and unwatch methods
of the Object object. |