function zobraz($co) {
	$zobraz = $co + '_l';
	$skryj =  $co + '_s';
		if (document.getElementById($skryj).style.visibility == "visible") {
			document.getElementById($skryj).style.visibility = "hidden";
			document.getElementById($skryj).style.display = "none";
			document.getElementById($zobraz).style.visibility = "visible";
			document.getElementById($zobraz).style.display = "block";
			//$('.page_body_login').show('slow');
		}
	return false;
};

function skryj($co) {
	$zobraz = $co + '_s';
	$skryj =  $co + '_l';
		if (document.getElementById($skryj).style.visibility == "visible") {
			document.getElementById($skryj).style.visibility = "hidden";
			document.getElementById($skryj).style.display = "none";
			document.getElementById($zobraz).style.visibility = "visible";
			document.getElementById($zobraz).style.display = "block";
			//$('.page_body_login').show('slow');
		}
	return false;
};