jquery, ajax: several post-requests instead of one -

i using django , jquery , try change button view after submit without page reloading. when press first time okay, second press lead 2 post-requests, third 3 , etc , button doesn't change anymore. although data in databases changes should every button pressing.

please, me find out wrong jquery code , how prevent post requests multiplication

 function send() {     $('.valid').submit(function()          {             var a_id = $(this).attr('a_id');             var vl = $(this).attr('vl');             $.ajax(             {                          data: {'a_id' : a_id},                         type: 'post',                          url: 'vl/',                          success: function(data, status)                          {                              $('#mark_'+a_id).html('<i class="icon-white icon-ok"></i> correct!')                             $('#mark_'+a_id).attr("id",'cor_'+a_id);                                      $('#cor_'+a_id).html('not correct')                             $('#cor_'+a_id).attr("id",'mark_'+a_id);                          },                         error: function(xhr, data)                          {                             alert('fail: ' + data +' answer #'+ a_id);                         }                        });          });  } 

a_id answer id , comes button in template

{% if answer.validity %}  <button id="cor_{{ answer.id }}" class="btn btn-inverse js-mark " a_id="{{answer.id}}"  onclick = "send()" ><i class="icon-white icon-ok"></i> correct answer</button>  {% else %}   <button id="mark_{{ answer.id }}" class="btn btn-inverse js-mark" a_id="{{answer.id}}" onclick = "send()" >mark answer correct</button>  {% endif %} 

the views.py part:

def question_vl(request, question_id):     context_instance=requestcontext(request)     question = get_object_or_404(question, pk=question_id)      if request.user == question.author:         if request.method == 'post':             if(request.post.get('a_id')):                          = answer.objects.get(pk=request.post.get('a_id'))                         if a.validity==false:                     a.validity = true                 else:                     a.validity = false                 a.save()         return httpresponse("") 

this line

$('.valid').submit(function() 

attaches submit event form. whenever press button function "send" attaches same event again.

modify buttons:

{% if answer.validity %}  <button class="btn btn-inverse js-mark" a_id="{{answer.id}}" onclick = "send(this)" ><i class="icon-white icon-ok"></i> correct answer</button>  {% else %}   <button class="btn btn-inverse js-mark" a_id="{{answer.id}}" onclick = "send(this)" >mark answer correct</button>  {% endif %} 

modify function way:

function send(button) {         button = $(button);         var a_id = button.attr('a_id');         $.ajax(         {                      data: {'a_id' : a_id},                     type: 'post',                      url: 'vl/',                      success: function(data, status)                      {                          if (data.validity){                            button.html('<i class="icon-white icon-ok"></i> correct!')                         } else {                            button.html('not correct!')                         }                          },                     error: function(xhr, data)                      {                         alert('fail: ' + data +' answer #'+ a_id);                     }                    });  } 

your server side script should return json data actual value of "validity"