How to create a javascript function to send a AJAX request to your cakePHP controller action;

function testajaxadd(question_id,answerindex){ 

var mydata=new Object();
mydata.question_id=question_id;
mydata.answerindex=answerindex;

jQuery.ajax({
type:'POST',
async: true,
cache: false,
data: mydata,
url: 'http://localhost/myquiz/questions-answers/ajaxadd',
success: function(response) { 
//success
console.log(response); 
},
error: function(response) { 
console.log(response);
}
});
}

Cakephp controller action;

public function ajaxadd(){

$questionsAnswer = $this->QuestionsAnswers->newEntity(); 
if ($this->request->is('ajax')) {

$questionsAnswer = $this->QuestionsAnswers->patchEntity($questionsAnswer, $this->request->data);

// Added this line which makes the record belong to the logged in user
$questionsAnswer->user_id = $this->Auth->user('id');

if ($this->QuestionsAnswers->save($questionsAnswer)) {

$status['msg']="Saved Record"; 

} else {
$status['msg']="Error Saving Record"; 
}

//return the message to js function
$this->response->body(json_encode($status));
return $this->response; 
}
}