function nav(num,state,i) {
	var arrow = "arrow" + num;
	var blip = "blip" + num;
	
	if (state == 'over') {
		src = '/images/red_blip.gif';
		src = base_url + src;
		src2 = '/images/white_arrow_down.gif';
		src2 = base_url + src2;
	}
	
	if (state == 'out') {
		src = '/images/blue_blip.gif';
		src = base_url + src;
		src2 = '/images/white_arrow.gif';
		src2 = base_url + src2;
	}
	
	change_image(blip,src);
	if(i=='2')change_image(arrow,src2);
}

function change_image(name,src) {
	if (document.getElementById) {
		elem = document.getElementById(name);
		elem.src = src;
	} else {
		document[name].src = src;
	}
}