function showmenu(param) {
	document.getElementById("menu1").style.display = 'none';
	document.getElementById("menu2").style.display = 'none';
	document.getElementById("menu3").style.display = 'none';
	document.getElementById("menu4").style.display = 'none';
	document.getElementById("menu5").style.display = 'none';
	document.getElementById("menu6").style.display = 'none';	
	document.getElementById("menu7").style.display = 'none';	
	document.getElementById("menu8").style.display = 'none';	
	document.getElementById("menu" + param).style.display = 'block';
}

function otworz(url, rozmx, rozmy, scrolls) {
    mywin=window.open(url,'window','toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars='+scrolls+',resizable=1,copyhistory=0,width='+rozmx+',height='+rozmy+',screenX=100,screenY=75,left=100,top=75');
    mywin.focus();
}

function stats() {
    statwin = window.open('./statystyki/', 'Statystyki');
    statwin.focus();
}