copy content to another document certain layer

Hello people I have made following code,

its a batch script

I want to copy all content from a document to another.

My issue is to activate a certain layer

Could someone help me?

see code here

[code]

//textLayer= app.activeDocument.layers.add ({name: "TT_IDML"});

var docSource=app.activeDocument;

var myFolder = Folder.selectDialog("Choose the folder")

if(myFolder.length==0)

{

    alert("No Folder Selected")

    exit(0)

    }

var myFiles = myFolder.getFiles("*.idml")

if(myFiles.length==0)

{

    alert("No InDesign files in folder")

    }

for(i=0; i<myFiles.length; i++)

{

    myFile = myFiles

//    alert(myFile)  

    app.open(myFile)

var docTarget=app.activeDocument;

var paletteObjects = app.activeDocument.layers[0].allPageItems;

app.select(paletteObjects);

app.copy();

app.activeDocument=docSource;

app.documents[0].layers.itemByName("TT_IDML").select;

    // app.pasteInPlace()

    }

[/code]

thank you in advance