DOMCharacterData inherits from DOMNode
Properties:
(string) data - read/write
(long) length - read only
Methods:
| (string) substringData(long offset, long count) | returns substring or empty string |
| (void) appendData(string arg) | append arg to data |
| (void) insertData(long offset, string arg) | insert string at offset |
| deleteData(long offset, long count) | delete count characters starting at offset |
| replaceData(long offset, long count, string arg) | replace count characters starting at offset with new string |