Notes/Domino 4 and 5 Forum

i make a field that named such as
x0,x1,x2, ... ,xn
but i don't want describe how many field.
some user can create 3 fields and other can create 100 fields.
should i create 100 fields before (hidden fields) ??
or can i just use script to auto create field and auto field naming by button action (ex. Add) ???
Example :
name0
name1
name2
.
.
.
namen
what is the script to create indexed field naming ??

thank you