var open_item;
if(document.getElementById('photos_list')!=null){
	photos = document.getElementById('photos_list').getElementsByTagName('a');
	for(var i=0;i<photos.length;i++){
		if(photos[i].style.display=='block'){
			open_item = photos[i].id;
			
		}
	}
}
function click_media(id_pg){ 
        if(open_item != null && 'pic'+id_pg!=open_item){
		document.getElementById(open_item).style.display = 'none';
		open_item = "";
	}
        if('pic'+id_pg!=open_item){
		open_item = 'pic'+id_pg;
                document.getElementById('pic'+id_pg).style.display = 'block';
        }
        return false;
};