Custom Functuion Module

hI ALL,

i had an requirement to create a custom idoc for catsdb table with 4 fields

1. pernr

2. workdate

3. lstar ......

and to transfer it from one application server to another.i had created in n transfered it to another application server. now my problem is in receiver side the data in idoc is posted into database of catsdb.

can any one give the code for Custom function module at receiver side so that when idoc is received [from sender] it must updated to databse tables via this FM.

its very urgent . help me ..............

with regards,

Suresh Aluri.