This means if one is doing cross site request by adding script tag and parsing json response will infringe this patent.
Yes. Maybe you could skirt this one patent by packaging data and script code in separate connections and by getting very lucky in a Markman hearing where a federal judge might allow you to shade claim construction language in your favor. That would require you to invest about $1 million minimum testing whether you could get a jury to buy it, of course, so I hope a million is just pocket change to you.
Even then, there are hundreds of other patents on the process of downloading Json/XML and parsing data or executable scripts out of it. The patent office hands them out like Hallowe'en candy -- for reasons I really don't understand but hope aren't just incompetence. You can look up a bunch related to the subject in the original version of this application from 2000:
US5881230 Jun 24, 1996 Mar 9, 1999 Microsoft Corporation Method and system for remote automation of object oriented applications
US5918010 Feb 6, 1998 Jun 29, 1999 General Internet, Inc. Collaborative internet data mining systems
US5918013 Jun 3, 1996 Jun 29, 1999 WebTV Networks, Inc. Method of transcoding documents in a network environment using a proxy server
US5959630 Jan 29, 1998 Sep 28, 1999 Sharp Kabushiki Kaisha Display screen processing apparatus and storage medium containing therein program for controlling display screen processing apparatus
US6021416 Nov 25, 1997 Feb 1, 2000 International Business Machines Corporation Dynamic source code capture for a selected region of a display
US6031989 Feb 27, 1997 Feb 29, 2000 Microsoft Corporation Method of formatting and displaying nested documents
US6101510 Jan 29, 1997 Aug 8, 2000 Microsoft Corporation Web browser control for incorporating web browser functionality into application programs
US6144990 Dec 23, 1996 Nov 7, 2000 International Business Machines Corporation Computer apparatus and method for communicating between software applications and computers on the world-wide web using universal variable handling
US6178426 Jan 15, 1998 Jan 23, 2001 Symbol Technologies, Inc. Apparatus with extended markup language data capture capability
You can find hundreds more with Google patent search.
It's not clear to me whether the process you describe would infringe. It seems to me that if the component server returns only a data object with all scripting instructions provided by the host computer, this patent would not be infringed. This patent appears to me to be speaking to plugins that return both data and script. Facebook's like button comes to mind, perhaps ...
