Ajax和JS文件

I am having a problem on ajax calls. Each time I want to refresh or add more data in an ajax controlled area, I have to include some js files.

this is my usual script for submiting data

<script type="text/javascript">
    function ajax_loader_order(x, y) {
        $.getScript("js/plugins.js");
        $.getScript("js/scripts.js");
        req = $.ajax({
            type: "GET",
            url: "products.php?order=" + y + "&orderud=" + x,
            datatype: "html",
            success: function(data){
                $('#container').html(data);
                $('html, body').animate({scrollTop: $("#main").offset().top}, 1000);
            }
        });
    }
    </script>

Loading those js files each time, makes the website heavier and slower.

Is there a way with which I can load those js files on first load and every time I call this ajax function, to be included?

Thank you in advance

Add them after your ajax-script import in your html

Pseudocode:

<html>
  <head>
    <script src="ajax.js" />
    <script src="js1.js" />
    <script src="js2.js" />
  </head>
  <body>
  </body>
</html>

or:

<html>
  <head>
  </head>
  <body>
    <script src="ajax.js" />
    <script src="js1.js" />
    <script src="js2.js" />
  </body>
</html>