title: Looking for best solution to implement AJAX TreeGrid
body: <p>I'm looking for a Ajax/TreeGrid (Tree with multiple columns) implementation.</p>
  
  <p>It has to:</p>
  
  <ol>
  <li>support server side sorting</li>
  <li>support on demand leaf loading - only children of open nodes are loaded</li>
  <li>support paging - nodes have to be loaded in chunks, only visible records are requested from server</li>
  <li>be free to use in commercial project</li>
  </ol>
  
  <p>I tried Dojo (dojox.grid.LazyTreeGrid) and it seems to have problems with pagination.</p>