function makevisible(cur,which){
	strength=(which==0)? 1 : 0.3

if (cur.style.MozOpacity)
	cur.style.MozOpacity=strength
else if (cur.filters)
	cur.filters.alpha.opacity=strength*100
}


function rozjasnienie(cur,which){
	strength=(which==0)? 1 : 0.6
if (cur.style.MozOpacity)
	cur.style.MozOpacity=strength
else if (cur.filters)
	cur.filters.alpha.opacity=strength*100
}