function zobrazSkryj(idecko)
{
	el=document.getElementById(idecko).style; 
	el.display=(el.display == 'block')?'none':'block';
}

function Hide(tagname)
{
	elements = document.getElementsByTagName(tagname);
	for (i = 0; i < elements.length; i++)
	{
		if (elements[i].className.toLowerCase() != "hidden")
			continue;
		elements[i].style.display = "none";
	}
}