🚀 go-pugleaf

 
var myDoc = app.activeDocument;
var myLinks = myDoc.links;

for (i = myLinks.length-1; i >= 0 ; i--) {
   var myLink = myLinks[i];
   var myFile = new File(myLink.filePath);
   var myNewName = myLink.name.replace("20283", "21483");
   if (myFile.exists) {
      myFile.rename(myNewName);
      myLink.relink(myFile);
      myLink.update();
   }
}

Thanks Kasyan, though I should have mentioned the 5 digit job number was an example only...both numbers would constantly be changing. I need a script where I could type the numbers into the script panel in InDesign itself...not the raw script. Is this possible?

Yes, I'm writing a new version.

 
#target indesign
if (app.documents.length == 0) {
   err("No documents are open. Please open a document and try again.");
}
if (app.activeDocument.links.length == 0) {
   err("The current document contains no images. Please open a document containing images and try again.");
}
var myFind, myChange, myResult;
var myDoc = app.activeDocument;
var myLinks = myDoc.links;


var myDialog = app.dialogs.add({name:"Change job number", canCancel:true});
var myColumn = myDialog.dialogColumns.add();
var myPanel = myColumn.borderPanels.add();
var myLabel1 = myPanel.staticTexts.add({staticLabel:"Change "});
var myText1 = myPanel.textEditboxes.add();
if (app.extractLabel("kas_myText1") != "") {
   myText1.editContents = app.extractLabel("kas_myText1");
}
var myLabel2 = myPanel.staticTexts.add({staticLabel:" to "});
var myText2 = myPanel.textEditboxes.add();
if (app.extractLabel("kas_myText2") != "") {
   myText2.editContents = app.extractLabel("kas_myText2");
}

if(myDialog.show() == true){
   var myFind = myText1.editContents;
   var myChange = myText2.editContents;

   app.insertLabel("kas_myText1", myFind);
   app.insertLabel("kas_myText2", myChange);

   for (i = myLinks.length-1; i >= 0 ; i--) {
      var myLink = myLinks[i];
      var myFile = new File(myLink.filePath);
      var myNewName = myLink.name.replace(myFind, myChange);
      if (myFile.exists) {
         myFile.rename(myNewName);
         myLink.relink(myFile);
         myLink.update();
      }
   }
   myDialog.destroy();
   alert("Done!");
}
else{
   myDialog.destroy();
}
function err(e) {
   alert(e);
   exit();
}

P.S. I haven't tested this, so use carefully.

No luck with this one, I get the following error:

Error Number -2741
Expected expression property or key form, etc. but found unknown token.

I tested the script in CS3 on Mac and PC and CS4 on Mac, using a simple document, which contains 3 links, named as in your 1st post. And it works for me.
Possible solutions:
* Send me a screenshot of the error message or run the script in ESTK and see which line it stops and error message it generates.
* Send me an archived copy of your document to recreate the error.

Sorry my scripting knowledge is a little limited, I had originally saved it as an applescript file. I've now saved through ESTK as a jsx file and it works perfectly! Thank you so much!

On a side thought which I hadn't even considered before, is it at all possible to first copy the files from the original job folder into the new job folder, and then rename and relink? So if I ran the script and it prompted me to select a new destination folder to copy to, and then prompted for the rename info?

I could simply copy and paste manually though it is often the case that the new job doesn't always use all of the images from the old job.

thanks! :D

 
#target indesign
if (app.documents.length == 0) {
   err("No documents are open. Please open a document and try again.");
}
if (app.activeDocument.links.length == 0) {
   err("The current document contains no images. Please open a document containing images and try again.");
}
var myFind, myChange, myResult;
var myFolder = Folder.selectDialog ("Choose a new job folder");
if (myFolder != null) {
   var myDoc = app.activeDocument;
   var myLinks = myDoc.links;

   var myDialog = app.dialogs.add({name:"Change job number", canCancel:true});
   var myColumn = myDialog.dialogColumns.add();
   var myPanel = myColumn.borderPanels.add();
   var myLabel1 = myPanel.staticTexts.add({staticLabel:"Change "});
   var myText1 = myPanel.textEditboxes.add();
   if (app.extractLabel("kas_myText1") != "") {
      myText1.editContents = app.extractLabel("kas_myText1");
   }
   var myLabel2 = myPanel.staticTexts.add({staticLabel:" to "});
   var myText2 = myPanel.textEditboxes.add();
   if (app.extractLabel("kas_myText2") != "") {
      myText2.editContents = app.extractLabel("kas_myText2");
   }

   if(myDialog.show() == true){
      var myFind = myText1.editContents;
      var myChange = myText2.editContents;

      app.insertLabel("kas_myText1", myFind);
      app.insertLabel("kas_myText2", myChange);

      for (i = myLinks.length-1; i >= 0 ; i--) {
         var myLink = myLinks[i];
         var myFile = new File(myLink.filePath);
         var myNewName = myLink.name.replace(myFind, myChange);
         var myNewFile = new File(myFolder + "/" + myNewName);
         if (myFile!= myNewFile) {
            if (myFile.exists) {
               myFile.copy(myNewFile);
               myLink.relink(myNewFile);
               myLink.update();
            }
         }
      }
      myDialog.destroy();
      alert("Done!");
   }
   else{
      myDialog.destroy();
   }
}
function err(e) {
   alert(e);
   exit();
}

PERFECT! Thank you so much for your help I really appreciate it!! :D