title: jqgrid dynamic columns and data by json
body: <p>I new learned about jqgrid.I want create grid by dynamic data and columns.
   I asked <a href="https://stackoverflow.com/questions/16191160/jqgrid-dynamic-columns/16195679?noredirect=1#comment23255506_16195679">my question</a> and read this <a href="https://stackoverflow.com/questions/2277962/jqgrid-and-dynamic-column-binding">link</a> but i needed more examples</p>