How to rewrite a excel-vba to acrobat javascript?

Question

this is a code from a excel macro (VB), how can i rewrite it, so it works on adobe acrobat?

for eg nummer is "161628686041430"

Function upsp(nummer)
' Übergeben wird KdNr+Serviceart+Paketnummer (ohne 1Z)
'
qsm = 0
For i = 1 To 15
p = Mid(nummer, i, 1)
If Asc(p) > 57 Then p = (Asc(p) - 63) Mod 10
qsm = qsm + (p * (2 - i Mod 2))
Next
upsp = 10 - (qsm Mod 10)
If upsp = 10 Then upsp = 0
End Function

the result of this function should be "2".

Thanks for help.

Answer 1

I think this is what you're looking for, I tried to keep as close as possible to the Excel code, hoping it would be easier to follow. Let me know if you have any questions...

 alert(upsp('161628686041430')); function upsp(nummer) { var qsm; var p; var returnValue; qsm = 0; for (var i = 0; i < nummer.length; i++) { p = nummer.substr(i, 1); if (p.charCodeAt(0) > 57) { p = (p.charCodeAt(0) - 63) % 10; } qsm = qsm + (p * (2 - ((i + 1) % 2))); } returnValue = 10 - (qsm % 10); if (returnValue === 10) { returnValue = 0; } return returnValue; }