function initMenu()
{
	var _menu = document.getElementById("navigation");
	if(_menu) {
		var _sets = _menu.getElementsByTagName("li");
		_sets[0].className += "first";
		_sets[_sets.length-1].className += "last";
	}
}

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