function closeAllSubMenu()
{
	var nav = document.getElementById("nav");
	if (nav)
	{
		var nodes = nav.getElementsByTagName("li");
		for (var i = 0; i < nodes.length; i++)
		{
			nodes[i].className = nodes[i].className.replace("hover", "");
		}
	}

}
function initPage()
{
	var nav = document.getElementById("nav");
	if (nav)
	{
		var nodes = nav.getElementsByTagName("li");
		for (var i = 0; i < nodes.length; i++)
		{
			if (nodes[i].parentNode.id == "nav")
			{
				nodes[i].onmouseover = function () 
				{
					closeAllSubMenu();
					this.className += " hover";
				}
			}
		}
	}
}
if (window.addEventListener)
	window.addEventListener("load", initPage, false);
else if (window.attachEvent && !window.opera)
	window.attachEvent("onload", initPage);