function elemsByClass(cname, elname)
	{
		var j = 0;
		var navrat = new Array;
		var elems = document.getElementsByTagName(elname);
		for(i = 0; i < elems.length; i++)
		{
			if(elems[i].className == cname)
			{
				navrat[j] = elems[i];
				j++;
			}
		}
		
		return navrat;
	}
	function carousel(zmenna)
	{
		var divy = elemsByClass("carousel", "div");
		if(zmenna >= divy.length)
			zmenna = 0;
		displayclass("carousel", zmenna, "block");
		
		setTimeout("displayclass('carousel', "+zmenna+", 'none');carousel("+(zmenna+1)+")", 6000);
	}
	
	function displayclass(prem, cislo, zmen)
	{
		var classes = elemsByClass(prem, "div");
		
		classes[cislo].style.display = zmen;
	}