O INSERT THE MODAL OF THE MENU THAT IS STORED IN A MENU_MODAL.HTML FILE-->
<div id="modal_menu_insertion"> </div>
<script>
$(function(){
  $("#modal_menu_insertion").load("html_chunk/menu_modal.html");
});
</script>

  <!-- Header -->
  <header class="masthead" style="padding-top: 150px; padding-bottom: 80px">
    <div class="textlanding">
      <h1>Treemap</h1>
      <hr class="short_hr">
      <br>
      <ul class="list-inline social-buttons">
        <li class="list-inline-item">
          <a href="https