Validation for alphabatics Id

public boolean validateWrite()

{

   //Created by: Dhanya — unibuzz

   //Date Created: 13th june 2011

   boolean ret;

   ;

   ret = super();

   if( (strlen(this.ItemGroupId)  < 3 || strlen(this.ItemGroupId)  > 3))

   {

        throw error(“Family must be exactly 3 characters”);

   }

   if(strnfind(this.ItemGroupId,“ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz”, 1, 3))

   {

       throw error(“Family should contain only alphabets. Numbers or special charaters not allowed”);

   }

   return ret;

}