public interface HTMLCollection
HTMLCollection is a list of nodes. An individual node may
 be accessed by either ordinal index or the node'sname or
 id attributes.  Note: Collections in the HTML DOM are assumed
 to be  live meaning that they are automatically updated when the
 underlying document is changed.
 See also the Document Object Model (DOM) Level 2 Specification.
| Modifier and Type | Method and Description | 
|---|---|
| int | getLength()This attribute specifies the length or  size of the list. | 
| Node | item(int index)This method retrieves a node specified by ordinal index. | 
| Node | namedItem(String name)This method retrieves a  Nodeusing a name. | 
int getLength()
Node item(int index)
index - The index of the node to be fetched. The index origin is
   0.Node at the corresponding position upon
   success. A value of null is returned if the index is
   out of range.Node namedItem(String name)
Node using a name. It first
 searches for a Node with a matching id
 attribute. If it doesn't find one, it then searches for a
 Node with a matching name attribute, but
 only on those elements that are allowed a name attribute.name - The name of the Node to be fetched.Node with a name or
   id attribute whose value corresponds to the specified
   string. Upon failure (e.g., no node with this name exists), returns
   null . Submit a bug or feature
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