Hi mssoft,
The source code of all the demos is available in the jQWidgets download package in the demos folder. This particular demo is in the jqxgrid subfolder and is named editrowsrendering.htm.
Alternatively, you can view the source code of the Edited Rows Rendering demo online by opening it and then opening the context menu of the browser (right mouse click) and selecting View page source (in Google Chrome) or View source (in Internet Explorer).
Best Regards,
Dimitar
jQWidgets team
http://www.jqwidgets.com/