function menuOver(e)
{
   if (!e) var e = window.event;
	var theSpan = e.target || e.srcElement;
   theSpan.style.backgroundPosition = "0 -30px";
}

function menuOut(e)
{
   if (!e) var e = window.event;
	var theSpan = e.target || e.srcElement;
   theSpan.style.backgroundPosition = "0 0";
}

for(var i = 0; i < document.getElementById("menu").childNodes.length; i++)
{
   document.getElementById("menu").childNodes[i].onmouseover = menuOver;
   document.getElementById("menu").childNodes[i].onmouseout = menuOut;
}