This function checks if a passed 'number' contains all numbers, so if every character is in the the '0123456789' range.This function strips out all characters from the input string that are not numeric.This function assumes you pass a Bank Account Number (strips out all non numeric characters) and checks the number with the 'ElfProef'. If it is succesful the result will be 1 (=True) else it returns 0 (=False).This function assumes you pass a 'Burger Service Number' (it strips out all non numeric characters) and checks the number with the 'ElfProef'. If it is succesful the result will be 1 (=True) else it returns 0 (=False).DataFlex Web Service for Checksums based on the 'ElfProef'. The 'ElfProef' is a CRC technique determine if a number is a valid number where the sum of the passed digits divided by 11 must be a integer. Security Note: No information about the passed numbers will be stored, we only count the number of times anyone used one of the functions of this webservice for statistic reports.