While viewing a PDF file, file is detected by any installed download manager rather than viewing it, how to overcome this behavior?

Question

I'm using jQuery Media Plugin to embedded PDF into a web page as listed in the following sample to ebmedded PDF files.
The problem is, if any download manager installed on client machine, it starts automatically downloading file rather than viewing it in web page which is not required.

I need to force viewing of PDF file in page. Is this can be achieved using Media plugin or any other plugins? or anyway which can be used within ASP.NET page and must be a cross browser solution.

[Edit]
* Converting PDF to images or using any flash viewer for embedding pdf is not preferred.
* Using Google Docs Viewer is not preferred.