jQuery(document).ready(function($) {
"use strict";

$('.btn_load_invitation_image').unbind('click').bind('click', function(event)
{
  event.preventDefault();
  var current_element = this;

  var uploader = wp.media(
  {
    title : 'Add invitation image',
    button : {
      text : 'Add',
    },
    multiple : false
  })

  .on('select', function()
  {
    var selection = uploader.state().get('selection');

    var attachements = [];

    selection.map(function(attachement)
    {
      attachement = attachement.toJSON();

      attachements.push([attachement.id, attachement.url, attachement.caption]);

      set_element_image_data(attachement.url, current_element, attachement.width);
      
    })

  })
  .open();

});
function set_element_image_data(url, current_element, width)
  {
    $(current_element).parent().find('input[name="datainv[invitation_image]"]').val(url);
  }

});