window.onload = initPage;

function $(id) {
	return document.getElementById(id) || false;
}

function initPage() {
	if($('main')) {
		var items = $('main').getElementsByTagName('A');
		var iLen = items.length;
		for (var i=0;i<iLen;i++) {
			if(items[i].parentNode.tagName == 'LI') {
				items[i].onmouseover = mOver;
				items[i].onmouseout = mOut;
			}
		}
	}
}

function mOver() {
	this.parentNode.className = 'active';
}

function mOut() {
	this.parentNode.className = '';
}