Loads a different PDF into each Frame.  If the PDF has been instrumented properly with message handlers for the HostContainer object, then the PDF can send and receive message strings with JavaScript in the browser. This example works in Internet Explorer for Acrobat 7.05 and later.  It works in FireFox, Safari, and  IE for Acrobat 8.1 and later. Scroll down to see the message passing controls, The message passing may or may not work depending on your browser, operating system, version of acrobat, and settings.