comma

 drupal_add_js(drupal_get_path('module', 'formModifications') .'/js/script.js');
      // Get the nodes.
      $chosenContents = "Contents Chosen :";
      $nodes_ser = trim($_GET['nodes']);
      $nodes = explode("-",$nodes_ser);
      $form = array();
      $tarLangId = "Langs:";


     foreach( $nodes as $key => $value){
            $node = node_load($value);
            $chosenContents .= $node->title." , ";
            }
           // $str = $chosenContents;
         // $str = substr($str, 0, -1);

    $form['content_information'] = array(
        '#value' => variable_get('content_form_information', $chosenContents),
        );