a.obrazek img {
	filter:alpha(opacity=50); 
	opacity: 0.5; 
}

a.obrazek:hover img {
	filter:alpha(opacity=100);    
	opacity: 1.0; 
}

a.galeria img {
	filter:alpha(opacity=50); 
	opacity: 0.5; 
}

a.galeria:hover img {
	filter:alpha(opacity=100);    
	opacity: 1.0; 
}