function hide(object, pic){
	var listRef = document.getElementById(object);
	listRef.style.display = "none";

	var imgRef = document.getElementById (pic);
	imgRef.src = "images/closed.png"
}//end hide


function show(object, pic){
	var listRef = document.getElementById(object);
	listRef.style.display = "";

	var imgRef = document.getElementById (pic);
	imgRef.src = "images/opened.png"
}//end show


function clickFolder(object, pic){
	var listRef = document.getElementById(object);

	if(listRef.style.display == "")
		hide(object, pic);
	else
		show(object, pic);
}//end clickFolder