var currentActiveItem = null;
var nodes = null;
var nav = null;

startList = function() {
	initMenu();
	if (nav) {
		if (nodes) {
			for (var i = 0; i < nodes.length; i++) {
				nodes[i].onmouseover = function() {
					for (var i = 0; i < nodes.length; i++) {
						if (nodes[i].className == 'active') {
							currentActiveItem = nodes[i];
							nodes[i].className = '';
						} else {
							nodes[i].className = "";
						}
					}
					this.className += " hover";
				}
				nodes[i].onmouseout = function() {
					this.className = this.className.replace(new RegExp(" hover"), "");
				}
			}
		}
	}
	nav.onmouseout = function()	 {
		for (var i=0; i<nodes.length; i++) {
			nodes[i].className = "";
		}
	
		if (currentActiveItem) {
			currentActiveItem.className = 'active';
		}
	}
}

initMenu = function () {
	nodes = document.getElementById("mainNav").getElementsByTagName("li");
	nav = document.getElementById("mainNav");
}

if (window.addEventListener) {
	window.addEventListener("load", startList, false);
} else if (window.attachEvent) {
	window.attachEvent("onload", startList);
}