function lightup(imageobject, opacity){
	if (navigator.appName.indexOf("Netscape")!=-1 && parseInt(navigator.appVersion)>=5){
		imageobject.style.MozOpacity=opacity/100;
	}else{
		if (navigator.appName.indexOf("Microsoft")!= -1 && parseInt(navigator.appVersion)>=4){
			imageobject.filters.alpha.opacity=opacity;
		}
	}
}