DataTables with AJAX

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-mockjax/1.6.2/jquery.mockjax.js"></script>
<link rel="stylesheet" href="https://cdn.datatables.net/v/dt/dt-1.10.18/b-1.5.2/b-print-1.5.2/sl-1.2.6/datatables.min.css">
<script src="https://cdn.datatables.net/v/dt/dt-1.10.18/b-1.5.2/b-print-1.5.2/sl-1.2.6/datatables.min.js"></script>
<table id="tb_rgc" class="display compact cell-border textos" cellspacing="0" width="100%">
</table>

JavaScript

/*!
 * Print button for Buttons and DataTables.
 * 2016 SpryMedia Ltd - datatables.net/license
 */

(function( factory ){
	if ( typeof define === 'function' && define.amd ) {
		// AMD
		define( ['jquery', 'datatables.net', 'datatables.net-buttons'], function ( $ ) {
			return factory( $, window, document );
		} );
	}
	else if ( typeof exports === 'object' ) {
		// CommonJS
		module.exports = function (root, $) {
			if ( ! root ) {
				root = window;
			}

			if ( ! $ || ! $.fn.dataTable ) {
				$ = require('datatables.net')(root, $).$;
			}

			if ( ! $.fn.dataTable.Buttons ) {
				require('datatables.net-buttons')(root, $);
			}

			return factory( $, root, root.document );
		};
	}
	else {
		// Browser
		factory( jQuery, window, document );
	}
}(function( $, window, document, undefined ) {
'use strict';
var DataTable = $.fn.dataTable;


var _link = document.createElement( 'a' );

/**
 * Clone link and style tags, taking into account the need to change the source
 * path.
 *
 * @param  {node}     el Element to convert
 */
var _styleToAbs = function( el ) {
	var url;
	var clone = $(el).clone()[0];
	var linkHost;

	if ( clone.nodeName.toLowerCase() === 'link' ) {
		clone.href = _relToAbs( clone.href );
	}

	return clone.outerHTML;
};

/**
 * Convert a URL from a relative to an absolute address so it will work
 * correctly in the popup window which has no base URL.
 *
 * @param  {string} href URL
 */
var _relToAbs = function( href ) {
	// Assign to a link on the original page so the browser will do all the
	// hard work of figuring out where the file actually is
	_link.href = href;
	var linkHost = _link.host;

	// IE doesn't have a trailing slash on the host
	// Chrome has it on the pathname
	if ( linkHost.indexOf('/') === -1 && _link.pathname.indexOf('/') !== 0) {
		linkHost += '/';
	}

	return _link.protocol+"//"+linkHost+_link.pathname+_link.search;
};


DataTable.ext.buttons.print = {
	className: 'buttons-print',

	text: function ( dt ) {
		return dt.i18n(...