title: make some row editable and other row readonly on dhtmlx grid
body: <p>i want to make a row in dhtmlx are read only but i want make the other row are editable with some condition like<br>
  id%2=0 are editable.</p>
  
  <pre><code>function doInitGrid(){
          mygrid = new dhtmlXGridObject('mygrid_container');
          mygrid.selMultiRows = true;
          mygrid.setImagePath("codebase/imgs/");
          mygrid.setHeader("No, Id, Kd Dep, Kd Prog");
          mygrid.setInitWidths("30,50,60,60");
          mygrid.setColAlign("left,left,left,left");
          mygrid.setColTypes("ro,ro,ro,ro");
          mygrid.init();
          mygrid.load('test.xml');
  }
  </code></pre>