set size of pdf page with jquery media

There is attached ASP.NET program using jquery media ([login to view URL]) for viewing embed PDF files. It is developed with Visual Studio 2010. What it does: Program calls a pdf file of one page and render it on browser. Click on "Next Page" or "Preview Page" button and another PDF file of one page is called. What is needed to do: User may set percentage size of PDF page view in textbox "txt_size" only once, so all PDF files will get this same size when user calls them clicking "Next Page" or "Preview Page" button. Check attached image for example. Communication only through freelancer.com. No Skype. Bid only if you can do it. No time-wasters.