var close = new Image();
	close.src = "/seetec/media/graphs/close.png"
var open = new Image();
	open.src = "/seetec/media/graphs/open.png"

var close_w = new Image();
	close_w.src = "/seetec/media/graphs/close2.png"
var open_w = new Image();
	open_w.src = "/seetec/media/graphs/open2.png"


function hide(ID,c) {
	var level = document.getElementById(ID);
	var img = document.getElementById(ID+"_img");
	level.style.display = "none";
	if (c == "w") {
		img.src = close_w.src;
	}
	else {
		img.src = close.src;
	}
}
	
function show(ID,c) {
	var level = document.getElementById(ID);
	var img = document.getElementById(ID+"_img");
	if (level.style.display == "none") {
		level.style.display = "block";
		if (c == "w") {
			img.src = open_w.src;
		}
		else {
			img.src = open.src;
		}
	}
	else {
		hide(ID);
	}
}