https://sbschool.org/js/frontend/link-image-grid.js?v=0.01

1// check/set hash
2if(window.location.hash) {
3	var hash_val_arr = window.location.hash.replace("#","").split("/");
4	if(hash_val_arr[1]) {
5		$('#grid_category_id option').removeAttr('selected');
6		$("#grid_category_id").val(hash_val_arr[1]);
7		$('#grid_category_id option[value='+hash_val_arr[1]+']').attr('selected','selected');
8		$("#grid_category_id").change();
9	}
10}
11
12setTimeout(function() {
13	var $grid = $('#grid-link-items').isotope({
14		itemSelector : '.element-item',
15		masonry: {
16			columnWidth: '.grid-sizer',
17			gutter: '.gutter-sizer'
18		}
19	});
20
21	var $items = $grid.find('.element-item');
22	$grid.addClass('loaded').isotope('layout');
23
24	// filter items on dropdown select
25	$("#grid_category_id").change(function() {
26		var select = $(this);
27		var filterValue = $(select).val();
28		if(filterValue) {
29			filterValue = '.dt-i-'+filterValue;
30			$grid.isotope({ filter: filterValue });
31			$('.element-item.now-viewing').removeClass('now-viewing');
32			$(filterValue).addClass('now-viewing');
33			window.location.hash = $(select).find("option:selected").text()+"/"+$(select).val();
34		} else {
35			$grid.isotope({ filter: '*' });
36			window.location.hash = "";
37		}
38	}).change();
39
40	// force refresh after items load
41	$('#grid-link-items').waitForImages(function() {
42		$('#grid-link-items').isotope('layout');
43	});
44},500);