batch find & replace text in Illustrator files in a folder?

I found this script which work greats on any currently open Illustrator files, but I would like it to be able to run the action on a Mac OS folder, open the first Illustrator, runs this javascript, save & close that file, then loop through all other Illustrator files in a folder and repeat the process, until the last file.

1. function FindAndReplaceScript_AllOpenDocuments(){     
2.     for(var i=app.documents.length -1; i > -1;  i--){     
3.         app.documents[i].activate(); 
4.         var aDoc = app.documents[i]; 
5.              
6.         var searchString = /VT/gi;    
7.         var replaceString = ‘VHB';      
8.              
9.         var theTF = aDoc.textFrames;     
10.         if (theTF.length > 0) {     
11.             for (var j = 0 ; j <theTF.length; j++) {     
12.                 var aTF = theTF[j];     
13.                 var newString = aTF.contents.replace(searchString, replaceString);     
14.                 if (newString != aTF.contents) {     
15.                     theTF[j].contents = newString;     
16.                 }     
17.             }     
18.         } 
19.     } 
20. };     
21. FindAndReplaceScript_AllOpenDocuments();