// arrowchange, open and close menu item
function chArrow(){
	if (document.getElementById && document.getElementById('menulevel01')) {
		var nMenu = document.getElementById('menulevel01');
		var nLi = nMenu.getElementsByTagName('LI');
		var nUl = nMenu.getElementsByTagName('UL');
		for(var ii=0; ii<nUl.length; ++ii) {
			nUl[ii].className = 'closed';
		}
		for(var ii=0; ii<nLi.length; ++ii) {
			nLi[ii].onclick = function() {
  			for(var jj=0; jj<nLi.length; ++jj) {
  				nLi[jj].className = '';
  			}
  			for(var jj=0; jj<nUl.length; ++jj) {
  				nUl[jj].className = 'closed';
  			}
  			this.className='active';
				var thisUl = this.getElementsByTagName('UL')[0];
				if (thisUl) {
  				thisUl.className='opened';
				}
  		}
  	}
  }
}
// events onload
function addLoadEvent(func) {
  if (window.addEventListener)
    window.addEventListener("load", func, false);
  else if (window.attachEvent)
    window.attachEvent("onload", func);
}
addLoadEvent(chArrow);