initTopNav = function() {
	if (document.all && document.getElementById) 
	{
		var navRoot = document.getElementById("top-nav");
		var lis = navRoot.getElementsByTagName("li");
		for (var i=0; i<lis.length; i++)
		{
			lis[i].onmouseover = function()
			{
				this.className += " hover";
			}
			lis[i].onmouseout = function()
			{
				this.className = this.className.replace(" hover", "");
			}
		}
	}
}

if (window.addEventListener)
{
	window.addEventListener("load", initTopNav, false);
}
else if (window.attachEvent && !window.opera)
{
	window.attachEvent("onload", initTopNav);
}