zend controller front

$params = Zend_Controller_Front::getInstance()->getRequest()->getParam('contactID');

$this->_view->

Zend_Registry::get('client');

in the Zend Controller
$params = $this->getRequest()->getParam('contactID');

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disable Layout

public function listaAction()
    {    
        $this->_helper->viewRenderer->setNoRender(true);
        $this->_helper->layout->disableLayout();
    }

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Use helper in view

in Bootstrap.php

add $this->addHelperPath('App/View/Helper', 'App_View_Helper);

JQuery load js after all doms have been loaded. $(function());

to use $(function()); and can load this js after all DOM loaded.