decimal points

i have a string 123,45,0.89.

my requirement is to identiy the commas

where exactly it is and need to delete the

commas.the string i am getting from the flat file,so the

commas maybe at the third and 5th position or etc.

so i cannot predict the commas where they are.so what ever the

string is i need to delete the commas and period should be there ie

decimal should be the there.

so tell me how to handle this.