function clickT(index) {
	var row = document.getElementById("nav").rows[index * 2 + 1];
	row.style.display = row.style.display == "" ? "none" : "";
	document.getElementById("toggleimg" + index).src = row.style.display == "" ? "http://www.mjjq.com/newcss/Go_x.gif" : "http://www.mjjq.com/newcss/Go_l.gif";
}