function ramka(wlacz, evt)
{		evt = (evt) ? evt : (window.event) ? window.event : ""; 
		var elt; 
		if (evt.srcElement)
		{		elt = evt.srcElement; 
		} else if (evt.target)
		{		elt = evt.target;
		}
		if (!elt) return;
		elt = document.getElementById(elt.id.replace(/z/, "r"));
		if (!elt) return;
		if (elt.id.charAt(0) == 'k') return;
		(wlacz == 1) ? elt.className = "chosen" : elt.className = "";
}

function show_hide(id)
{       to_show = document.getElementById(id);
        if(to_show.style.display == "") to_show.style.display = "block"; else to_show.style.display = "";
}

function show(el)
{       to_show = document.getElementById(el);
        document.getElementById("k1").style.display = "none";
        document.getElementById("k3").style.display = "none";
        document.getElementById("k6").style.display = "none";
        document.getElementById("k8").style.display = "none";
        to_show.style.display = "block";
}