const sub_categories = () => {

		var cat_opener	= document.querySelectorAll("[class='sub-categories']");
		var cat_list	= document.querySelectorAll("[class='sub-category-list']");

		for(var i=0; i<cat_opener.length; i++)
		{
			cat_opener[i].addEventListener("click", (event) => {

				for(var i=0; i<cat_list.length; i++)
				{
					cat_list[i].style.display = "none";
				}

				sibling	= event.currentTarget.nextElementSibling;
				sibling.style.display = "block";
			});

		}

	}



	window.onload = function(){ sub_categories() }