Renaming active document without saving

[Kernzy]

I'm looking for a way to rename your active document's name without saving it.

Sounds mundane, but with some other scripts I have in my workflow, this could help smooth some stuff out.

I looked for a native solution in the application and couldn't find it. I took a jab at it and this is what I've come up with. 

var doc = activeDocument;
var docName = jobNumber3;
    
     //Active Job Name Ringer
    var jobNumber = doc.name.replace(".ai", "");
    var jobNumber2 = jobNumber.replace(".pdf","");
    var jobNumber3 = jobNumber2.replace(".eps","");

//alert(jobNumber3)

var win = new Window("dialog")
    win.text = "Document Renamer"
    win.size = [375,100]
    win.orientation = "column";

    var changeArea = win.add("group"); 
        changeArea.orientation = "row"
        changeArea.add("statictext", undefined, "Change document name");
        var newDocName = changeArea.add("edittext", undefined, jobNumber3)
        newDocName.size = [125,30]

    var buttonGroup = win.add("group");
    var okayButton = buttonGroup.add("button", undefined, "Okay")
        okayButton.onClick = function() {
            alert(jobNumber3)
            alert(newDocName.text)
            doc.name.????????? = newDocName.text;
            win.close();
            }
    var cancelButton = buttonGroup.add("button", undefined, "Cancel")
        cancelButton.onClick = function() {
            win.close()};
 win.show()

At this point, I'm questioning if it's even possible without saving the document.
Any assistance is appreciated!

[Brad @ Roaring Mouse]

You can't rename an open file. Your operating system will prevent it. What you CAN do is utilize the Save A Copy function, which allows you to save as a new name without affecting your open document. Of course, you then have two documents. But this should be scriptable.

[CarlosCanto]

What's the purpose? wouldn't you need to save the document down the road?