function galeria_over (obj)
{
	obj.style.filter = 'alpha(opacity=100)';
	obj.style.MozOpacity = 1;
}

function galeria_out (obj)
{
	obj.style.filter = 'alpha(opacity=50)';
	obj.style.MozOpacity = 0.5;
}

// style="filter:alpha(opacity=50); -moz-opacity:0.5"