IE5=NN4=NN6=false;
if(document.all)IE5=true
else if(document.layers)NN4=true
else if(document.getElementById)NN6=true
 
function showDiv( which ) {
	for(i = 1; i <= numdivs; i++) { 
		if(NN4) eval("document.galeria" + i + ".visibility='hidden'") 
		if(IE5) eval("document.all.galeria" + i + ".style.visibility='hidden'") 
		if(NN6) eval("document.getElementById('galeria" + i + "').style.visibility='hidden'") 
	} 
	if(NN4) eval("document.galeria" + which + ".visibility='visible'") 
	if(IE5) eval("document.all.galeria" + which + ".style.visibility='visible'") 
	if(NN6) eval("document.getElementById('galeria" + which + "').style.visibility='visible'") 
}