// PNG rollovers for IE
function PNGswap(myID) {
	var strOver  = "_on"
	var strOff = "_off"
	var oSpan = document.getElementById(myID)
	var currentAlphaImg = oSpan.filters(0).src
	if (currentAlphaImg.indexOf(strOver) != -1)
		oSpan.filters(0).src = currentAlphaImg.replace(strOver,strOff)
	else
		oSpan.filters(0).src = currentAlphaImg.replace(strOff,strOver)
}

function pngLinks() {
	$$('#nav0 li a').each(function(el, index) {
	    el.addEvent('mouseover', function() {
			PNGswap(el.id);
	    });

		el.addEvent('mouseout', function() {
			PNGswap(el.id);
	    });
	});
}

window.addEvent('domready', pngLinks);