AJAX :: Display Uploaded Image Via Javascript?

I have an asyncfileupload control. AFTER the file has been successfully saved to disk I want to assign the uploaded image to a HTML element. To show it to the user.

Important: in the afuFlyer_UploadedComplete method I'm renaming the image, so the image saved to disk does NOT have the same name as the file the user initially uploaded.

I have this:

<cc1:AsyncFileUpload ID="afuFlyer" OnClientUploadComplete="Async_UploadComplete" OnUploadedComplete="afuFlyer_UploadedComplete" UploaderStyle="Modern" runat="server" />

and a javascript function:

function Async_UploadComplete(sender, args) {
var filename = args.get_fileName();
var contentType = args.get_contentType();
var text = "Size of " + filename + " is " + args.get_length() + " bytes";
document.getElementById('lblStatus').innerText = text;
}

But the args.get_fileName(); is useless since the filename has been changed. So I need to pass the new filename to this method somehow?
Also, is the image actually already saved to disk when the Async_UploadComplete function is called? Or has the upload to the server just been completed and not the saving to server disk?

Ive also tried working with ScriptManager.RegisterClientScriptBlock and ScriptManager.RegisterStartupScript in afuFlyer_UploadedComplete method without success: