void insertData(unsigned long offset, String arg) throws DOMException;
offset
The character position within the Text or Comment node at which the string is to be inserted.
arg
The string to insert.
This method may throw a DOMException with one of the following code values in the following circumstances:
INDEX_SIZE_ERR
offset is negative or greater than the length of the Text or Comment node.
NO_MODIFICATION_ALLOWED_ERR
The node is read-only and may not be modified.
This method inserts the specified string arg into the text of a Text or Comment node at the specified position offset.