JS CS3 Relink image to new path

Question

I've put a script together that resizes images in a doc. What I've been able to do is rename the resized image  and then relink to the renamed images. I'd like to be able to have all the resized images saved into the folder using the doc name which is not hard. What I am finding difficult is setting the path to that folder for the relink.
for example:
var myLinks = app.activeDocument.allGraphics;
var myFpath = myLinks[0].itemLink.filePath
var myFname = myLinks[0].itemLink.name
$.write(myFpath.replace(myFname,app.activeDocument.name+"/"+myFname) +"\r");
returns C:\hold\Untitled-1/file_24791_Scaled.tif
if I try and change +"/"+ to +"\"+ the remaining code is commented out I've also tried "/\/" which returned //
should I try using replace to return /C/hold/Untitled-1/file_24791_Scaled.tif which should work on both PC and Mac?
Any suggestions would be appreciated.
Cheers, John.

Answer 1

Thanks to Kasyan's LinkUsage function I was able to put this script together.
The script is set to look for Tiff and PSD files that are scaled at less then 99%. It will rename the file a version and update the indesign document with that version.
So if you have a doc with Ducky.tif duplicated 3 times in the link panel you will see 3 instances of Ducky.tif. After running the script you will find that in the folder that holds the indd doc a folder named the same as the indd doc is created and within it will be Ducky_3.tif and Ducky_2.tiff. The script will also relink to these new versions of the file.
This script could be changes to allow other types of files but for some reason I've found that if I open a JPG using the PhotoShop script the save dialog opens in Photoshop require user to ok it. I do not seem to get the same issues with Tiff and PSD files. If there is something I'm doing wrong please let me know.
var myDocName = app.activeDocument.name.split(".")[0];
var myDocPath = app.activeDocument.filePath+"/"+app.activeDocument.name.split (".")[0]+"/";
var myLinks = app.activeDocument.allGraphics;
for ( var r = myLinks.length-1; r >= 0; r-- ){ 
    if(myLinks[r].itemLink.parent.absoluteHorizontalScale < 99 && (myLinks[r].itemLink.linkType == 'TIFF' || myLinks[r].itemLink.linkType == 'Photoshop')){
if(LinkUsage(myLinks[r].itemLink)>1){
var verFName = myLinks[r].itemLink.name.split (".")[0];   
var verNum = LinkUsage(myLinks[r].itemLink)
VersionInPS( myLinks[r].itemLink.filePath, myDocPath, verNum);
            if (File.fs == "Windows") {
    var aVerFolder = myDocPath + verFName +"_"+verNum+".tif";
    else if (File.fs == "Macintosh") {
        var aVerFolder = myDocPath  + verFName+"_"+verNum+".tiff";
            myLinks[r].itemLink.relink( File(aVerFolder));
for ( var u = myLinks.length-1; u >= 0; u-- ){ 
    myLinks[u].itemLink.update();
function VersionInPS(myPath, myDocPath, myVersion) { 
   var bt = new BridgeTalk;  
   bt.target = "photoshop";  
   var myScript = 'try {\n';  
   myScript += 'var myPsDoc = app.open(File(\"' + myPath + '\"));\n';  
   myScript += 'var myNewFolder = new Folder("'+myDocPath+'"); \n' ;
   myScript += 'if (myNewFolder.exists){ \n' ;
   myScript += '}else{ \n' ;
   myScript += 'myNewFolder.create(); \n' ;
   myScript += '} \n' ;
   myScript += 'var justname = myPsDoc.name.split (".")[0]; \n' ;
   myScript += 'newFile = new File( myNewFolder+"/"+justname+"_"+'+myVersion+' ); \n' ;
   myScript += 'tiffSaveOptions = new TiffSaveOptions(); \n' ;
   myScript += 'tiffSaveOptions.embedColorProfile = false; \n' ;
   myScript += 'tiffSaveOptions.jepgQuality =10; \n' ;
   myScript += 'tiffSaveOptions.matte = MatteType.NONE; \n' ;
   myScript += 'myPsDoc.saveAs(newFile, tiffSaveOptions, true,Extension.LOWERCASE); \n' ;
   myScript += 'myPsDoc.close(SaveOptions.DONOTSAVECHANGES);\n'; 
   myScript += '}\n';  
   myScript += 'catch (myError) {\n';  
   myScript += 'myPsError += \"myError' + myPath + '\";\n';  
   myScript += '}';  
   bt.body = myScript;
   bt.onResult = function(resObj) {} // empty function - to wait untill PS finishes processing the file
   bt.send(100); // !!! bt.send(1);
function LinkUsage(myLink) {
    var myLinkCounter = 0;
        for (var myCounter =  0; myCounter < myLinks.length; myCounter++) {
        if (myLink.filePath == myLinks[myCounter].itemLink.filePath) {
            myLinkCounter++;
    return myLinkCounter