// htmlMap fce
function get(id) 
{
	if (document.getElementById)
		return document.getElementById(id);
	else
		return false;
}

function chngr(rID)
{
	get(rID).style.visibility = "visible";
}

function rstr(rID)
{
	get(rID).style.visibility = "hidden";
}
	/* plati jen pro prahu */
	function chngrr(rID)
	{
		document.getElementById("stredocesky").style.visibility = "hidden";
		get(rID).style.visibility = "visible";
	}
	
	function rstrr(rID)
	{
		get(rID).style.visibility = "hidden";
	}