function initMenu(){
	var _nav = document.getElementById('nav');
	if(_nav){
		var _li = _nav.getElementsByTagName('li');
		var _chd = [];
		var _active = null;
		for(var i=0; i<_li.length; i++) {
			if(_li[i].parentNode.id=='nav') _chd.push(_li[i]);
			
			_li[i].onmouseover = function(){
				for(var j=0; j<_chd.length; j++) {
					_chd[j].className = _chd[j].className.replace('active','');
				};
				if(this.className.indexOf('active')==-1) this.className += ' active';
			};
			_li[i].onmouseout = function(){
				this.className = this.className.replace('active','');
			};
 			_nav.onmouseout = function(){
				if(_active && _active.className.indexOf('active')==-1) _active.className += ' active';
			} 
		}
	}
}

if (window.addEventListener) window.addEventListener("load", initMenu, false);
else if (window.attachEvent) window.attachEvent("onload", initMenu);