Note : Both Netscape and Internet Explorer support the Elements collection (Netscape call it an array).
The Elements collection is an ordered, indexed array, containing a reference to every element on a <FORM>
object. The collection is ordered by source order i.e. the order that the elements appear in the document. The Elements collection consists of <INPUT>
, <SELECT>
and <TEXTAREA>
elements. (See those topics for details of the elements properties, methods and events.
Elements Objects would normally be retrieved by their index in the Elements collection (for example document.<FORM>reference.elements(3)
contains a reference to the 4th element object on the referenced <FORM>
), but a string value can be used, as long as that string is a valid identifier (ID
attribute value) for an element in the referenced <FORM>
.
length
The length
property returns the number of elements in the collection. Note that the length
count starts at 1, not 0 as the elements collection index does. Therefore, the length
property may return a value of 5, but to access the 3rd element, you'd need to use document.<FORM>reference.elements(2).property
item
The item
method retrieves single items, or sub-collections from the elements collection. It accepts the following arguments:
elements.item(index, sub-index)
If index
is a number, then the method returns a reference to the element object at that position in the elements collections index. I.e.
strTag=document.<FORM>reference.elements.item(2).tagName
would make strTag
be the tagName
property ('INPUT' for <INPUT>
, 'SELECT' for <SELECT>
etc.) for the third element contained on the <FORM>
referenced by <FORM>reference
.
If the index
property is a string value, then the item
method returns a sub-collection, containing a reference to every element in the referenced <FORM>
that has its ID
or NAME
attribute set to the string contained in the index
argument. To retrieve certain element objects from this sub-collection, the sub-index
argument must be used.
tags
The tags
method returns a collection of element objects whose tagName
property is the same as the tag
argument used for the method. This differs from the item
property in that that interrogates ID
and NAME
values if necessary.
document.<FORM>reference.elements.tags('INPUT')
would return a collection of all the <INPUT>
objects in the referenced <FORM>
.
© 1995-1998, Stephen Le Hunte
file: /Techref/language/html/ib/Scripting_Reference/elcol.htm, 4KB, , updated: 2004/3/1 16:47, local time: 2024/8/15 00:30,
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