Having Some issue with serial number

Hi Everyone ,

    Im having serial number issue for my adobe form , so im hiding some fields in my table with JS code that is (

if ( this.Batch.rawValue != null )

{
this.presence = "hidden";
}   but now problem is serial number giving me issue , as its also counting hidden rows and code im using for serial number is  ( this.rawValue = this.parent.index + 1; ) I want to adjust serial number , so can anyone please help tweak this code or help me find workaround .