Someone knows how to get the rows on band(1) with javascript, I try to select all checkbox on second band but I´m using...

function SelectAll(colIndex) {
     var checked = cbSelectAll.checked; 
     //var rows;
     alert(oGrid.Rows.length);

     for (i = 0; i < oGrid.Rows.length; i++) {
           oGrid.Rows.getRow(i).getCell(1).setValue(checked);
           //rows = oGrid.Rows.getRow(i).getChildRows();
           //rows.getCell(colIndex).setValue(checked);
      }
} ///End of Header Select All functionality

with these code I only select the rows of first band...

help me, please thanks...