// přepínání obrázků na první stránce
function stopError() {
  return true;
}

window.onerror = stopError;

if (document.images){                 
	image1 = new Image();
	image1.src = "images/o-1.jpg";
	image2 = new Image();
	image2.src = "images/o-2.jpg";
	image3 = new Image();
	image3.src = "images/o-3.jpg";
	image4 = new Image();
	image4.src = "images/o-4.jpg";
}

function imgOn(imgName){
	if (document.images){
		document["main"].src = eval(imgName + ".src");	
    }
}

function imgOff(){
	    if (document.images){
			document["main"].src = eval("image1" + ".src");
		}
}

function showLayer(divName){
	document.all[divName].style.visibility='visible';
}

function hideLayer(divName){
	//alert('hideLayer '+divName);
	document.all[divName].style.visibility='hidden';
}

timerID=null;
function skryj(divName){
	timerID=window.setInterval("hideLayer(divName); zrus0()",750);
}

function zrus0(){
	window.clearInterval(timerID);
}