function subli(image,start,end) {
	if (image.src.substr(-8,4)=='down') {
		for (x=start;x<=end;x++) {
			document.getElementById('subli'+x).style.display='none';
		}
		image.src='images/navarrow_right.png';
	} else {
		for (x=start;x<=end;x++) {
			document.getElementById('subli'+x).style.display='block';
		}
		image.src='images/navarrow_down.png';
	}
}

function get_lastchild(n) {
	x=n.lastChild;
	while (x.nodeType!=1) {
		x=x.previousSibling;
	}
	return x;
}