https://sentinel-asia.org/js/include.js

1var headerhtml = '_include/header.html';
2function headerInclude(directory){
3  $.ajax({
4    type: 'get',
5    url: directory + headerhtml,
6    dataType: 'html',
7    success: function(data) {
8        data = data.replace(/\{\$root\}/g, directory);
9        $("header").append(data);
10    }
11  });
12}
13
14var footerhtml = '_include/footer.html';
15function footerInclude(directory){
16  $.ajax({
17    type: 'get',
18    url: directory + footerhtml,
19    dataType: 'html',
20    success: function(data) {
21        data = data.replace(/\{\$root\}/g, directory);
22        $("footer").append(data);
23    }
24  });
25}