var note = 1;
function next(){
	document.getElementById('notes_'+note).style.display = 'none';
	if(note < 4) note++;
	else note = 1;
	document.getElementById('notes_'+note).style.display = 'block';
}

function prev(){
	document.getElementById('notes_'+note).style.display = 'none';
	if(note > 1) note--;
	else note = 4;
	document.getElementById('notes_'+note).style.display = 'block';
}

function show_notes(image){
	var all = document.all ? document.all : document.getElementsByTagName('*');
	var elements = new Array();
	//alert(image.src.replace("spacer.png","show.jpg"));
	if(image.src.substring(image.src.length-8) == "show.png"){
		for (var e = 0; e < all.length; e++) if (all[e].className == 'notes_show') all[e].style.display = 'block';
		image.src = image.src.replace("show.png", "spacer.png");
	}else{
		for (var e = 0; e < all.length; e++) if (all[e].className == 'notes_show') all[e].style.display = 'none';
		image.src = image.src.replace("spacer.png","show.png");
	}
}