function change (id, action) {
	if (document.getElementById(id)!=null)
	 if (action=="hide") {
		document.getElementById(id).className = "hidden";

	 } else {
/*	document.getElementById(id).style.display = "block";*/
		document.getElementById(id).className = "eshop-galerie";
	 }
}

function showTag (tagNamePrefix, tagNameNumShow, tagNum)
/* tagID prefix, tag ID cislo k zobrazeni, celkovy pocet tag k skryti*/
{
	for (i=1; i<tagNum+1; i++)
		change (tagNamePrefix+i,"hide");
	
	change (tagNamePrefix+tagNameNumShow,"show");
	return (1);
}