title: Example of jqGrid TreeGrid that loads node children from JSON service on expand
body: <p>The base problem is I have a TreeGrid that I has a significant number of nodes (over 6k) and I want to be able to load a branch when the user expands a node rather than loading all at once.</p>
  
  <p>I know this is possible in jqGrid (the documentation indicates so just very poorly worded <a href="http://www.trirand.com/jqgridwiki/doku.php?id=wiki:adjacency_model" rel="nofollow">http://www.trirand.com/jqgridwiki/doku.php?id=wiki:adjacency_model</a> ) but what I can't figure out is the precise set of jqGrid settings I need to make it do that. </p>
  
  <p>I do have a functional TreeGrid that will load all records from the 'url' parameter, so the only trick I need is for it to only load the top node alone, and then load it's children when I click the ExpandRow.</p>