function menuHover()
{
	var menuItem = document.getElementById("menu").getElementsByTagName("li");
	
	for (var i = 0; i < menuItem.length; i ++)
	{
		menuItem[i].onmouseover = function()
		{
			this.className += " hover";		
		}
		
		menuItem[i].onmouseout = function()
		{
			this.className = this.className.replace(new RegExp(" hover\\b"), "");
		}
	}
}

if (window.attachEvent) window.attachEvent("onload", menuHover);