JavaScript HTMLCollection interface code_javascript skills

Copy code The code is as follows:

interface HTMLCollection
{
//Contains nodes Number
readonly attribute unsigned long length;
//Return the corresponding node according to the specified index index
//The nodes in HTMLCollection are in a tree structure, and the index value index is node depth first The sequence number sorted by the method
Node item (in unsigned long index);
//Return the corresponding node according to the name or id attribute of the node
Node namedItem (in DOMString name);
}