snirgel

class YourController extends Controller
{
   public function your_returnAction(){
        $lReturn = array();
        //use renderview instead of render, because renderview returns the rendered template
        $lReturn['html'] = $this->renderView('Bundle:Controller:yourtemplate.html.twig');

        return new Response(json_encode($lReturn), 200, array('Content-Type'=>'application/json'));
  }
}

snirgel

/**
 * @author Karina Mies
 * @description Mirrors the input of an textfield, identified by id
 */
jQuery.fn.mirrorValue = function(){
  return this.each(function(){
    var lCurrentText, lId, lMirrorClass; 
    jQuery(this).keyup(function(e) {
      lId = '#'+jQuery(this).attr('id');
      lMirrorClass = '.'+jQuery(this).attr('id')+'-mirror';