function initPage(){
	var _nav = document.getElementById('navigation');
	if(_nav){
		var _list = _nav.getElementsByTagName('li');
		for(var i = 0; i < _list.length; i++){
			var _box = _list[i].getElementsByTagName('ul')[0];
			if(_box){
				if(_box.parentNode == _list[i]){
					var _btn = _list[i].getElementsByTagName('a')[0];
					if(_btn){
						if(_btn.parentNode == _list[i]){
							_btn._parent = _list[i];
							_btn.onclick = function(){
								if(this._parent.className.indexOf('opened') != -1) this._parent.className = this._parent.className.replace('opened','');
								else this._parent.className += ' opened';
								return false;
							}
						}
					}
				}
			}
		}
	}
}
if (window.addEventListener){
	window.addEventListener("load", initPage, false);
}
else if (window.attachEvent && !window.opera){
	window.attachEvent("onload", initPage);
}