// zobrazí skryté a skryje zobrazené
function showhide(what)	{

	if (document.getElementById(what).style.display == 'none') {
		document.getElementById(what).style.display = 'inline';
	} else {
		document.getElementById(what).style.display = 'none'; 
	}
	
	return false;
}

function showhideBlock(what)	{

	if (document.getElementById(what).style.display == 'none') {
		document.getElementById(what).style.display = 'block';
	} else {
		document.getElementById(what).style.display = 'none'; 
	}
	
	return false;
}