Get the value of a value in the widgets CgridView

Get the value of a value in the widgets CgridView

Good night I'm trying to capture the id of a row cdesde a CgridView I hope they can help me any suggestions I'll be grateful, regards

Function that calls the window where the CgridView is located 

  1. <script >
         function buscarArticulo() {
     window    .open("../articulo/catInventario", "popupId", "location=no,menubar=no,titlebar=no,resizable=no,toolbar=no, menubar=no,width=500,height=500"); 
         }
         </script>
This is the function in the popup window:
 
  1. <script language="javascript">
    function cerrar(idarticulo) {
    window    .opener.document.getElementById('idarticulo').value = <?php echo $model->idarticulo; //the new id ?> 
    window    .close();
    }
    </script>
This is the CgridView widget:
  1. <?php $this->widget('zii.widgets.grid.CGridView', array(
                'id'=>'catInventario-grid',
                'dataProvider'=>$model->search(),
                'filter'=>$model,
                'columns'=>array(
                        'idarticulo',
                        'codigo',
                        'nombre',
                        'descripcion',
                        'imagen',
                        'uso_interno',
                        /*
                    'idcategoria',
                    'idpresentacion',
                    'cod_impuesto',
                    */
                    array    (
                                'class'=>'CButtonColumn',
                                'template'=>'{elegir}',
                                'buttons'=>array(
                                        'elegir'=>array(
                                                'click'=>'cerrar',
                                                ),

                                        ),

                        ),
                ),
    )); ?>
This is the model, where is the search for the complete search 
  1. public function search()
                {
                    

                    $criteria    =new CDbCriteria;

                    $criteria    ->compare('idarticulo',$this->idarticulo);
                    $criteria    ->compare('codigo',$this->codigo,true);
                    $criteria    ->compare('nombre',$this->nombre,true);
                    $criteria    ->compare('descripcion',$this->descripcion,true);
                    $criteria    ->compare('imagen',$this->imagen,true);
                    $criteria    ->compare('uso_interno',$this->uso_interno,true);
                    $criteria    ->compare('idcategoria',$this->idcategoria);
                    $criteria    ->compare('idpresentacion',$this->idpresentacion);
                    $criteria    ->compare('cod_impuesto',$this->cod_impuesto,true);

                        return new CActiveDataProvider($this, array(
                                'criteria'=>$criteria,
                        ));
                }
And this is the controller function:
  1. public function actionCatInventario()
  2.         {
  3.                 $model=new Articulo('search');
  4.                 $model->unsetAttributes();  // clear any default values
  5.                 if(isset($_GET['Articulo']))
  6.                         $model->attributes=$_GET['Articulo'];

  8.                 $this->render('catInventario',array(
  9.                         'model'=>$model,
  10.                 ));
  11.         }
As you realize, it is for a web expenses form and for this sense I only need the idarticle, I hope to have been clear and they can help me, thank you very much for your time