(no version information, might be only in CVS)
DOMCharacterData->replaceData -- 
     Replace a substring within the DOMCharacterData node.
    
Description
void 
DOMCharacterData->replaceData ( int offset, int count, string data)
     Replace count characters starting from position 
     offset with data. If the 
     sum of offset and count 
     exceeds the length, then all characters to the end of the data are 
     replaced.
    
     Throws DOMExcpetion if offset 
     is negative or greater than the number of characters in data, or if 
     count is negative.