function pokaz_menu(menu, menu_a)
{
	menu1 = document.getElementById('koszyk');
	menu2 = document.getElementById('dane');
	menu3 = document.getElementById('transakcje');
	
	menu1_a = document.getElementById('koszyk_a');
	menu2_a = document.getElementById('dane_a');
	menu3_a = document.getElementById('transakcje_a');

	menu1.style.display = "none";
	menu2.style.display = "none";
	menu3.style.display = "none";

	menu1_a.style.borderBottom = "1px solid";
	menu2_a.style.borderBottom = "1px solid";
	menu3_a.style.borderBottom = "1px solid";

	widoczne_menu = document.getElementById(menu);
	widoczne_menu.style.display = '';

	widoczne_menu_a= document.getElementById(menu_a);
	widoczne_menu_a.style.borderBottom = '0px';
}
function okno_produkt(url)
{
	var Win = window.open(url,"okno_produkt",'width=780,height=500,top=50,left=200,menubar=no,resizable=yes,scrollbars=yes');
}

function okno_rec(url)
{
	var Win = window.open(url,"okno_rec",'width=500,height=300,top=50,left=200,menubar=no,resizable=no,scrollbars=no');
}
function okno_info(url,wi,hi)
{
	var Win = window.open(url,"okno_rec",'width='+wi+',height='+hi+',top=50,left=200,menubar=no,resizable=no,scrollbars=no');
}
function read_rec(url)
{
	var Win = window.open(url,"read_rec",'width=500,height=300,top=50,left=200,menubar=no,resizable=no,scrollbars=yes');
}