function changeListStatus (id) {
	var open = true;
	var table = document.getElementById(id);
	if (table.style.visibility == "visible") open = false;
	var tables = document.getElementsByTagName("table");
	for (var i = 0; i < tables.length; i++) {
		if (tables[i].className != "head_list_table") continue;
		tables[i].style.visibility = "hidden";
	}
	if (open == true) table.style.visibility = "visible";
};