// Node Functions

if(!window.Node){
  var Node = {ELEMENT_NODE : 1, TEXT_NODE : 3};
}

function checkNode(node, filter){
  return (filter == null || node.nodeType == Node[filter] || node.nodeName.toUpperCase() == filter.toUpperCase());
}

function getChildren(node, filter){
  var result = new Array();
  var children = node.childNodes;
  for(var i = 0; i < children.length; i++){
    if(checkNode(children[i], filter)) result[result.length] = children[i];
  }
  return result;
}

function getChildrenByElement(node){
  return getChildren(node, "ELEMENT_NODE");
}

function getFirstChild(node, filter){
  var child;
  var children = node.childNodes;
  for(var i = 0; i < children.length; i++){
    child = children[i];
    if(checkNode(child, filter)) return child;
  }
  return null;
}

function getFirstChildByText(node){
	if( firstTextNode = getFirstChild(node, "TEXT_NODE") )
		return firstTextNode;
	else
 		return false;
}

function getFirstChildByAnchor(node){
	if( firstTextNode = getFirstChild(node, "A") )
		return firstTextNode;
	else
 		return false;
}


function getNextSibling(node, filter){
  for(var sibling = node.nextSibling; sibling != null; sibling = sibling.nextSibling){
    if(checkNode(sibling, filter)) return sibling;
  }
  return null;
}
function getNextSiblingByElement(node){
        return getNextSibling(node, "ELEMENT_NODE");
}

// Menu Functions & Properties

var activeMenu = null;
if( !setMenu ) var setMenu = null;

function showMenu() {
  if(activeMenu){
    activeMenu.className = "";
    getNextSiblingByElement(activeMenu).style.display = "none";
  }
  if(this == activeMenu){
    activeMenu = null;
  } else {
    this.className = "active";
    getNextSiblingByElement(this).style.display = "block";
    activeMenu = this;
  }
  return false;
}

function initMenu(){
  var menus, menu, text, a, i;
  menus = getChildrenByElement(document.getElementById("menu"));
  for(i = 0; i < menus.length; i++){
    menu = menus[i];
    if( a = getFirstChildByAnchor(menu) ){
		var text = a.firstChild;
		var textValue = text.nodeValue.replace( /[\n\r]*/, " " ); 
		textValue = textValue.replace( /(?:^\s)|(?:\s$)/ig, "" );
		textValue = textValue.replace( " ", "_" );
		textValue = textValue.replace( /[^a-zA-Z0-9_]/igm, "" );
		if( textValue == setMenu ) {
			a.className = "active";
			getNextSiblingByElement(a).style.display = "block";
			activeMenu = a;
		}
	} 
  }
}

if(document.createElement) window.onload = initMenu;

// JavaScript Document