title: Checkbox status with onEditCell event in dhtmlxGrid
body: <p>I am using custom grid with checkbox. where i am getting some data from DB, example: Item1, Item2, Item3...</p>
  <p>there are some condition.</p>
  <p><strong>condition one:</strong>
  In grid, Item1 will be disable and user can only select Item3. he must not be able to click on Item2.</p>
  <p><strong>Second condition:</strong> user can select any item.</p>
  <p>In both case i have to get selected Item and need to store somewhere.</p>
  <p>I searched and found that we can do this kind of operation by &quot;<strong>onEditCell</strong> event. but i am not sure how to use that. as by this event i am getting only stage 1 &amp; 2 .</p>
  <pre><code>grid.attachEvent(&quot;onEditCell&quot;, function(stage,rId,cInd,nValue,oValue) {
                  console.log(&quot;stage &quot; + stage);
                  console.log(&quot;rId &quot; + rId);
                  console.log(&quot;cInd &quot; + cInd);
                  console.log(&quot;nValue &quot; + nValue);
                  return true;
          });
  </code></pre>
  <p>How can i get the selected item.. pls help</p>