if (typeof(IE) == "undefined") IE = document.all ? true : false;

var timer = 50;
var krok = 15;
var kon_alpha = 100;

function rozbal_info(totoid, nastav) {
  var objekt = document.getElementById(totoid);
  var alpha_objekt = document.getElementById(totoid + '_alpha');
  var alpha = 0;
  var smer = 1;
  var par = [];
  
  if (!alpha_objekt) {
    if (objekt) objekt.style.visibility = (nastav > 0) ? 'visible' : 'hidden';
  }
  else if (objekt) {
    par = alpha_objekt.innerHTML.split(';');
    alpha = parseInt(par[0]);
    smer = parseInt(par[1]);
    if (smer == 0) smer = -1;
    if (nastav != 0) smer = nastav;
    alpha += krok * smer;
    if (IE) alpha += krok * smer;
    if (alpha < 0) alpha = 0;
    if (alpha > kon_alpha) alpha = kon_alpha;
    alpha_objekt.innerHTML = alpha + ";" + smer;
    
	  objekt.style.visibility = (alpha > 0) ? 'visible' : 'hidden';
    objekt.style.opacity = alpha * 0.01;
	  if (IE) objekt.style.filter = 'alpha(opacity=' + alpha + ')';
	  
	  if (((smer > 0) && (alpha < kon_alpha)) || ((smer < 0) && (alpha > 0))) {
      window.setTimeout(function(){rozbal_info(totoid, 0)}, timer);
    }
  }
}