Properties/Methods	Functional Description	Data	Test Case
length	The number of nodes in the map.  The range of valid child node incies is 0 to length-1 inclusive.	2	cmap001.html
getNamedItem(name)	Retrieves a node specified by name.  Returns a Node (of any type) with the specified name, or null if the specified name did not identify and node in the map.	bgcolor	cmap002.html
setNamedItem(arg)	Adds a node using its nodeName attribute.  If the new Node replaces an existintg node with the same name, the preivously existing Node is returned, otherwise null is returned.	text	cmap003.html
removeNamedItem(name)	Removes a node specified by name.  If the removed node is an Attr with a default value it is immediately replaced.  Returns the node removed from the map or null if no node with such a name exists.	bgcolor	cmap004.html
item(index)	Returns the indexth item in the map.  If index is greater than or equal to the number of nodes in the map, this returns null.	text	cmap005.html