// Zmena obrazku v navigaci

var preloadFlag = false;

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}
	
function preloadImages() {
	if (document.images){
		preloadFlag = true;
	}
}

function zmen(nazev_obrazku,img)
{
var n = document.getElementById(nazev_obrazku);
n.src = img;
}

function OpenImg(imgsrc,xx,yy) {
xxw=xx+50; yyh=yy+50;
{ NewWin = new Array() }
{ NewWin = window.open("","foto","scrollbars=0,resizable=1,width="+xxw+",height="+yyh+"") }
{ NewWin.document.writeln("<title></title><body bgcolor=#FFFFFF><CENTER><br><a href='javascript:close()'><img src="+imgsrc+" width="+xx+" height="+yy+" border=0></a></body>") }
{ NewWin.document.close() }
}

function winH() {
	if (window.innerHeight) return window.innerHeight;
	else if (document.documentElement && document.documentElement.clientHeight)
		return document.documentElement.clientHeight;
	else if (document.body && document.body.clientHeight)
		return document.body.clientHeight;
	else return null;
	}
function winW() {
	if (window.innerWidth) return window.innerWidth;
	else if (document.documentElement && document.documentElement.clientWidth)
		return document.documentElement.clientWidth;
	else if (document.body && document.body.clientWidth)
		return document.body.clientWidth;
	else return null;
	}
function rozmery() {
	alert('Sirka okna: '+winW()+'px, vyska okna: '+winH()+'px.');
	}

function Posun() {
	if(document.layers)
	{
	var n = eval("document.menu")
	n.style.height=winH()-55+' px';
	}
	else
	{  
		document.getElementById('menu').style.height=winH()-55+'px';
	}
}

var stara = "nic";

function Ukaz_info(a) {
        element = document.getElementById(stara);
        element.style.visibility = "hidden";

        element = document.getElementById(a);
        element.style.visibility = "visible";

        stara = a;
}
