POST and Get in the same Ajax request

I am using a ajax post in my application like

 $.ajax({
	 type: "POST",
	url: "http://localhost/FormBuilder/index.php/forms/saveForm/"+user_id,

	data: "formname="+formname+"&status="+status,
	 success: function(msg){
	 // alert( "Data Saved: " + msg);
				}//success
 });//ajax

In the above ajax post i am saving the Form with the user id

Could i able to get the Form id of the Form that i saved in the Ajax request . If so how??

I have tried with Ajax get in a separately.But here i want to mix up both post and get..
Could i do that..
EDIT:

COuld i return any value for the Ajax POST method . Since i want to return the Form id of the Form saved..

Edit:

alert("Data Saved: "+msg); gives as

 Data Saved: {"forms":[{"id":"41"},{"id":"35"},{"id":"34"},{"id":"33"},{"id":"32"},{"id":"22"},{"id":"3"},{"id":"2"},{"id":"1"}]}

THe above is what the value returned i want only th id 41 how should i get it??

EDIT:

     $.ajax({
     type: "POST",
    url: "http://localhost/FormBuilder/index.php/forms/saveForm/"+user_id,
    datatype: 'json',
    data: "formname="+formname+"&status="+status,
     success: function(json){
        alert( "id is : " + json.forms[0].id);
                            }//success
     });//ajax

Even i tried it with the above code as suggested, But i am not able to get the alert message..

My controller code is like

     function saveForm()
    {
        	//$userId=$this->Session->read('userId');
        $this->data['Form']['name']=$this->params['form']['formname'];
            $this->data['Form']['created_by']=$this->Session->read('userId');
            $this->data['Form']['status']=$this->params['form']['status'];
            $this->data['Form']['access']="Private";
            $userId=$this->Form->saveForms($this->data);
            $formid = $this->Form->find('all', array('fields' => array('Form.id'),
    								'order' => 'Form.id DESC' 					    						                            ));



            $this->set('formid',$formid);

    }

And my save_form.ctp has

      <?php
     $data=array();

      ?>
     <?php foreach ($formid as $r): 


      array_push($data, array('id' => $r['Form']['id']));

    endforeach; 

     echo json_encode(array("forms" => $data));

    ?>