Page does not finish loading when using getJSON

Page does not finish loading when using getJSON

         I am a beginner to jQuery and I am facing a odd problem. I have to retrieve some information via the getJSON method in jQuery from a php page. But everytime I open that page, my data is retrieved without any problems but the page is shown to be still connecting. Please see image-:
Also I am getting weird links when I right click on the back button-:
Please see image-:
I thought AJAX requests where not suppose to load another page then there should be no such entry in my browsing history. I am using the latest version of WAMP server and my html file is as follows-:
  1. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">
    <html xmlns="">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <script type="text/javascript" src="" ></script>

  2. <body>
    <script type="text/javascript" >
    $(document).ready(function(e) {

And my php file is as follows-:
  1. <?php
    $a=array('data' => 'Hello World');

I am really frustrated with this problem. I mean my code is as simple as it gets. WHAT AM I DOING WRONG?? I am testing this on the latest version of Mozilla Firefox on Windows 8 Pro 64bit.

The output of my Web Console from Firebug in Firefox is as follows(check Image)-: