function changeClass(Elem, myClass) {
	var elem;
	if(document.getElementById) {
		var elem = document.getElementById(Elem);
	} else if (document.all){
		var elem = document.all[Elem];
	}
	elem.className = myClass;
}

function ratingHover(hodnota)
{
  var obrazek = new Array();
  
  for (var i=1; i<=5; i++)
  {
    if (i<=hodnota) changeClass('rating'+i, 'ratingOn');
      else changeClass('rating'+i, 'ratingOff');
  }     
}