// Al-Zard
// tree_menu.js

// state images
var bWithStateImage = false;

var cImg = new Image(); // the "expand menu" image
cImg.src = '';
var eImg = new Image(); // the "compress menu" image
eImg.src = '';

// single node selection
var bSingleSelection = false;


function setSingleSelection(state) {
	bSingleSelection = state;
}

function setStateImages(compress, expand) {

	bWithStateImage = true;

	cImg.src = expand;
	eImg.src = compress;
}

function toggleState(node) {

	if (bSingleSelection)
		resetAll(node);

	return doToggle(node);
}
function doToggle(node, reset) {

	var n = document.getElementById(node);

	if(!reset)
		reset = "block";

	n.style.display = (n.style.display != 'none' ? 'none' : reset);
	
	if (bWithStateImage)
		document.images[node + 'Img'].src = (n.style.display == reset ? eImg.src : cImg.src);

	//return (n.style.display == reset);
	return false;
}

function resetAll(node) {

	var node;
	var n;
	var nIdx = getIdx(node);
	var d = document.getElementsByTagName("A");
	var n = document.getElementById(node);
	if(n.style.display == "none") {
		for(var i = 0; i < d.length; i++)
			if(d[i].onclick) {
				node = d[i].onclick.toString();
				node = node.substr(node.lastIndexOf("(") + 2);
				node = node.substr(0, node.lastIndexOf(")") - 1);

				if(getIdx(node) == nIdx)
					doToggle(node, "none");
			}
	}
}

function getIdx(node) {
	var i = 0;
	var n = document.getElementById(node);

	if(n)
		while(n.parentNode) {

			n = n.parentNode;
			i++;
		}	
	return i;
}