function fixPNG(filename)
{
  if (/MSIE (5\.5|6).+Win/.test(navigator.userAgent))
  {
	document.getElementById('mmenu').style.backgroundImage="none";
	document.getElementById('mmenu').style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='/image/"+filename+"', sizingMethod='scale')";
  }
  else
  {
	document.getElementById('mmenu').style.backgroundImage="url(/image/"+filename+")";
  }
}