Validating the dd-mm and Year data in webui???

Hi All,

I added two new fields in webui, one is a year field ( i took it as Numeric 4, as the user should enter only years as input here ), the second one is of type char5 ( as the user should enter  dd-moth here ). So i need to validate these inputs in do_validate_input whether the user has entered the years, dd-mm or he entered some other text which is not relevant???? Are there any FM's or some procedure to validate these inputs??

Thanks & Regards,

         Bala.