function o(id)
{
	var element = document.getElementById("menu_"+id);
	if (element) {
		element.style.display = (element.style.display == 'none') ? "block" : "none";
	}
}
function powieksz(url, w, h)  {
	var w2 = w+10;
	var h2 = h+30;
	okno=window.open(url,'FullWindow','left=0,top=0,width='+w+',height='+h+',innerheight='+w2+',innerwidth='+h2+',toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no');
	okno.resizeTo(w2,h2);
	okno.focus();
}