function initPage(){
	var _menu = document.getElementById('nav');
	if(_menu){
		var _h = _menu.offsetHeight;
		var t_el;
		var t_p;
		var _list = _menu.getElementsByTagName('li');
		for(var i = 0; i < _list.length; i++){
			if(_list[i].parentNode == _menu){
				t_el = _list[i].getElementsByTagName('a')[0];
				t_p = (_h - _list[i].offsetHeight)/2 + 13 +'px';
				t_b = (_h - _list[i].offsetHeight)/2 + 7 + 'px';
				t_el.style.paddingTop = t_p;
				t_el.style.paddingBottom = t_b;
			}
		}
	}
}
if (window.addEventListener) window.addEventListener("load", initPage, false);
else if (window.attachEvent && !window.opera) window.attachEvent("onload", initPage);