function velkaf(a, b){
	document.getElementById('velky_obr').childNodes[0].childNodes[0].src=null
	
	document.getElementById('velky_obr').style.display='block'
	setTimeout("velkaf1('"+a+"','"+b+"')", 200);
	
	
	return false
}

function velkaf1(a,b){
	if (typeof(window.scrollY)!='undefined')
	document.getElementById('velky_obr').style.top=(parseInt(window.scrollY)+185)+'px'
	document.getElementById('velky_obr').childNodes[0].childNodes[0].src=a
	document.getElementById('velky_obr').childNodes[0].childNodes[0].alt=b


}