#photostream a img {
	filter:alpha(opacity=45);
	-moz-opacity:0.45;
	-khtml-opacity: 0.45;
	opacity: 0.45;
}
#photostream a img.visible {
	filter:alpha(opacity=100);
	-moz-opacity:1;
	-khtml-opacity: 1;
	opacity: 1;
}