DOMStringList Interface Use: HTMLPropertiesCollection names Since: DOM Level 3 DOM Properties get onlyunsigned long list.length the number of strings in this list DOM Interface Methods boolean list.contains(DOMString str) Parameters: str - a string to be matched against the strings in this list Return value:true if str exists in this list or false if it does not exist Node list.item(unsigned long index) list[index] list(index) Parameters: index - index of the node to be returned, where the first index is 0 and the last index is length - 1 Return value:the (index + 1)th node in this list (for example, if index is 3, the fourth node is returned) if 0 < index < length - 1, or else null