DOMCharacterData::deleteData — Remove a range of characters from the node
Deletes count characters starting from position offset.
The offset from which to start removing.
The number of characters to delete. If the sum of offset and count exceeds the length, then all characters to the end of the data are deleted.
No value is returned.
Raised if offset is negative or greater than the number of 16-bit units in data, or if count is negative.