function ukaz(foto,alt,sirka,vyska)
  {
  	var obj = document.getElementById('foto');
  	
  	//obj.innerHTML=alt+"<br /><img src='foto/"+foto+"c.jpg' alt='"+alt+"' />";
  	obj.innerHTML="<p>"+alt+"</p><img src='"+foto+"b.jpg' alt='"+alt+"' />";
  	
  	  if (document.documentElement && document.documentElement.scrollTop)
	theTop = document.documentElement.scrollTop;
	else if (document.body)
	theTop = document.body.scrollTop;
	
 obj.style.top = theTop-40+(document.documentElement.clientHeight-vyska)/2+"px";
 //obj.style.left = (document.documentElement.scrollWidth-sirka)/2+"px";
 obj.style.left = (726-sirka)/2+"px";
  	obj.style.display = 'block';
  	}
  
  function zavri()
  {
  	obj = document.getElementById('foto');
	obj.style.display = 'none';
	obj.innerHTML="";
  }