pageInit = function(){
	el = document.getElementsByTagName('UL');
	for (i=0; i< el.length; i++){
		if (el[i].parentNode.id == 'nav'){
			lastItem = el[i].getElementsByTagName('li').length - 1;
			el[i].getElementsByTagName('li')[lastItem].className = el[i].getElementsByTagName('li')[lastItem].className + ' last';
		}	 
	}
}

if (window.attachEvent){
	window.attachEvent('onload', pageInit);
}
else if (document.addEventListener) {
	document.addEventListener('DOMContentLoaded', pageInit, false);
}