- $form->addInput(array('type'=>'combobox','name'=>'tracking_mode','style'=>'width: 150px;','data'=>$tracking_mode_options,'value'=>$cl_tracking_mode));
+ $form->addInput(array('type'=>'combobox','name'=>'tracking_mode','style'=>'width: 150px;','data'=>$tracking_mode_options,'value'=>$cl_tracking_mode,'onchange'=>'handleTaskRequiredCheckbox()'));
+ $form->addInput(array('type'=>'checkbox','name'=>'project_required','value'=>$cl_project_required));
+ $form->addInput(array('type'=>'checkbox','name'=>'task_required','value'=>$cl_task_required));