Unknown script in my webpage

Question

Today I saw one white pixel on my website's background, at first I thought that's it's my monitor, but it didn't appear on another website. Then I inspected this pixel with firebug and found out this:

<script src="http://i.swebdpjs.info/opt_content.js?v=opt_1405411874643&partner=sweb&channel=sweb&sset=1&appTitle=&sset=1&ip=127.0.0.1" type="application/x-javascript">

I never added this script, and the strangest part is that it doesn't appear in my source files, and this website is not on hosting company, it's on my localhost. Does anyone has knowledge on what might it be? http://swebdpjs.info points to http://www.limelight.com/.

Answer 1

It's a script inserted by DealPly, which you probably have installed.

Answer 2

As per the comments above i'm posting this answer

1. xss attacks.

2. Be Sure that you have right anti virus tools installed on your machine.

3. If not contact you administrator to do that.

4. Take backup of only code using configuration managers.

Hope this helps...