WordPress 3.5 media uploader in easier steps. If using other than edit post screen, don't forget to use wp_enqueue_media(); in your functions.php

WP3.5 Media Uploader

jQuery(document).ready(function($){
  var _custom_media = true,
      _orig_send_attachment = wp.media.editor.send.attachment;
  $('.stag-metabox-table .button').click(function(e) {
    var send_attachment_bkp = wp.media.editor.send.attachment;
    var button = $(this);
    var id = button.attr('id').replace('_button', '');
    _custom_media = true;
    wp.media.editor.send.attachment = function(props, attachment){
      if ( _custom_media ) {
        $("#"+id).val(attachment.url);
      } else {
        return _orig_send_attachment.apply( this, [props, attachment] );
      };
    }
    wp.media.editor.open(button);
    return false;
  });
  $('.add_media').on('click', function(){
    _custom_media = false;
  });
});

Hi, this solution was really helpful. But when I used it with Wordpress v4.7.5, everything worked fine but I would also receive a:

TypeError: document.getElementById(...) is null

With some experimenting, I got rid of the error. Please check updated code here.

How do we get all the selected URLs? Currently, we only receive only one file from selected files in variable attachment.url.