function init()
{
	var uls = document.getElementById('main-nav').getElementsByTagName('ul');
	for(i=0;i<uls.length;i++)
	{
		uls[i].onmouseover = function(){changeClass(this);};
		uls[i].onmouseout = function(){resetClass(this);};
	}
}
function changeClass(uls)
{
	var atag = uls.previousSibling.previousSibling;
	atag.className = "selected";
}
function resetClass(uls)
{
	var atag = uls.previousSibling.previousSibling;
	atag.className = "";
}

window.onload = init;