Incremental Numbering for File Names

Question

I've been trying to wrap my head around this problem all day. So I've found two very helpful scripts on this forum: here and here. The second one works, but I'd like to be able to direct where the files are saving to and I'd like to save them as .tifs. It seems like the first script is exactly the one I want, but when I run it I get the following error (I have CS 5):
I'm trying to use this as a learning exercise, but man, it's a steep curve.
Thanks
jonathan.

Answer 1

I got the script working. Took out some of the superfluous steps. Here it is in case anyone is curious:
// This script will save the active document to a folder with an incremental sufix
// Change the options below to match your needs
var saveFolder = new Folder( '/D/Civil War/Process/Screen Caps' );
var saveExt = 'tif';
var saveSufixStart = '_';
var saveSufixLength = 3;
tifOpts = new TiffSaveOptions();
tifOpts.embedColorProfile = true;
tifOpts.imageCompression = TIFFEncoding.NONE;
tifOpts.alphaChannels = false;
tifOpts.layers = false;
// End of user options
//==========================================
function zeroPad ( num, digit ){
   var tmp = num.toString();
   while (tmp.length < digit) { tmp = "0" + tmp;}
   return tmp;
var docName = decodeURI ( activeDocument.name );
docName = docName.match( /(.*)(\.[^\.]+)/ ) ? docName = docName.match( /(.*)(\.[^\.]+)/ ) : docName = [ docName, docName, undefined ];
var saveName = docName[ 1 ]; // activeDocument name with out ext
var files = saveFolder.getFiles( saveName + '*.' + saveExt );// get an array of files matching doc name prefix
var saveNumber = files.length + 1;
alert("New file number: " + zeroPad( saveNumber, saveSufixLength ));
var saveFile = new File( saveFolder + '/' + saveName + '_' + zeroPad( saveNumber, saveSufixLength ) + '.' + saveExt );
activeDocument.saveAs( saveFile, tifOpts ,true ,Extension.LOWERCASE);