theObjects = document.getElementsByTagName("a"); 
for (var i = 0; i < theObjects.length; i++) { 
theObjects[i].style.filter="alpha(opacity:80)";
theObjects[i].style.KHTMLOpacity="0.80";
theObjects[i].style.MozOpacity="0.80";
theObjects[i].style.opacity="0.80";
}

theObjects = document.getElementsByTagName("b"); 
for (var i = 0; i < theObjects.length; i++) { 
theObjects[i].style.filter="alpha(opacity:100)";
theObjects[i].style.KHTMLOpacity="0.100";
theObjects[i].style.MozOpacity="0.100";
theObjects[i].style.opacity="0.100";
}