function StringFitsFilter(str, filter)
{
	let match = true;
	let filter_upper = filter.toUpperCase();
	let filter_substrings = filter_upper.split(/[ _*]+/);
	let str_upper = str.toUpperCase();
	let minimum_index = 0;

	for(let i = 0; i < filter_substrings.length; ++i)
	{
		if(filter_substrings[i].length > 0)
		{
			let index_of_substring = str_upper.indexOf(filter_substrings[i], minimum_index);
			if(index_of_substring < 0 || index_of_substring < minimum_index)
			{
				match = false;
				break;
			}
			minimum_index = index_of_substring + filter_substrings[i].length - 1;
		}
	}

	return match;
}

function UpdateListByFilter(menu_id, filter_id)
{
	let ul = document.getElementById(menu_id);
	let li = ul.getElementsByTagName("li");
	let input = document.getElementById(filter_id);
	let filter = input.value.toUpperCase();
	for(let i = 0; i < li.length; i++)
	{
		if(filter.length > 0)
		{
			let a = li[i].getElementsByTagName("a")[0];
			if(StringFitsFilter(a.innerHTML, filter))
			{
				li[i].style.display = "";
			}
			else
			{
			    li[i].style.display = "none";
			}
		}
		else
		{
			li[i].style.display = "";
		}
	}
}

function SearchInput(event, lister_idx)
{
	UpdateListByFilter("lister_"+lister_idx, "lister_search_"+lister_idx);
}

function SearchKeyDown(event, lister_idx)
{
	UpdateListByFilter("lister_"+lister_idx, "lister_search_"+lister_idx);
}