//fLibrary

// fCore: core functions of F Library

function fGetElementById(id)
{
	return(document.getElementById(id));
}

function fGetFirstChild(parent, childTag)
{
	var children = parent.childNodes;
	for(var i=0;i<children.length;i++) {
		if(children[i].tagName) {
			if(children[i].tagName.toLowerCase() == childTag.toLowerCase())
				return(children[i]);
		}
	}
	return(null);
}

function fLTrim(str)
{
	var whitespace = new String(" \t\n\r");
	var s = new String(str);
	if (whitespace.indexOf(s.charAt(0)) != -1) {
		var j=0, i = s.length;
		while (j < i && whitespace.indexOf(s.charAt(j)) != -1)
			j++;
		s = s.substring(j, i);
	}
	return(s.toString());
}

function fRTrim(str)
{
	var whitespace = new String(" \t\n\r");
	var s = new String(str);
	if (whitespace.indexOf(s.charAt(s.length-1)) != -1) {
		var i = s.length - 1;
		while (i >= 0 && whitespace.indexOf(s.charAt(i)) != -1)
			i--;
		s = s.substring(0, i+1);
	}
	return(s.toString());
}

function fTrim(str)
{
	return(fLTrim(fRTrim(str)));
}

// fMenu: part of F Library
//Dependencies: {xCore}

function fMenu(ul, selClass)
{
	selClass = fTrim(selClass);
	var menu, ret = false;
	if(typeof(ul) == 'string') {
		ul = fTrim(ul);
		menu = fGetElementById(ul);
		this.obj = menu;
	}
	else {
		menu = ul;
	}
	if(!menu)
		return(false);
	if(menu.hasChildNodes()) {
		var children = menu.childNodes;
		for(var i=0;i<children.length;i++) {
			var menuItem = fGetFirstChild(children[i], 'a');
			var subMenu = fGetFirstChild(children[i], 'ul');
			var inPath = false;
									
			if(subMenu) {
				inPath = fMenu(subMenu, selClass);
				var self = this;
				menuItem.onclick = function() {fMenuToggle(this, self.obj);}
				if(!inPath && !fMenuMatchClass(children[i], selClass)) {
					subMenu.style.display = 'none';
				}
			}
			if(inPath || fMenuMatchClass(children[i], selClass))
				ret = true;
		}
	}
	return(ret);
}

function fMenuMatchClass(node, className)
{
	var ret = false;
	if(node.className) {
		if(fTrim(node.className) == fTrim(className))
			ret = true;
	}
	return(ret);
}

function fMenuToggle(menuItem, obj)
{
	if(menuItem) {
		var parent = menuItem.parentNode;
		if(parent) {
			var subMenu = fGetFirstChild(parent, 'ul');
			if(subMenu) {
				if(obj)
					CollapseAll(obj, subMenu);
				if(subMenu.style.display != 'none')
					subMenu.style.display = 'none';
				else
					subMenu.style.display = 'block';
			}
		}
	}
	return(true);
}

function CollapseAll(obj, current)
{
	var subMenus = obj.getElementsByTagName('UL');
	for(var i=0;i<subMenus.length;i++) {
		if(subMenus[i] != current)
			subMenus[i].style.display = 'none';
	}
}