var Browser = ZistiBrowser();
	  var Krok1=25;
	  var Krok2=10;
	  
	  var Rychlost=100;
	  var loopID=new Array();

	  function ZistiBrowser()
	  {
	    if ((navigator.appName.indexOf("Netscape")!=-1)&&(parseInt(navigator.appVersion)>=5))
		  return 2; //Netscape 5+
		else if ((navigator.appName.indexOf("Microsoft")!=-1)&&(parseInt(navigator.appVersion)>=4)&&(navigator.userAgent.indexOf("Opera")==-1))
		  return 1; //MSIE4+
		else
		  return 0;  
	  }
	  
  	  function ZmenIntenzitu(Pridavam,Obrazok,Krok)
	  {
		if (Browser==1)
  	    {
		  x = document.getElementById(Obrazok).filters.alpha.opacity + ((Pridavam==1) ? Krok : -Krok );
		  document.getElementById(Obrazok).filters.alpha.opacity = ((x<0)?0:((x>100)?100:x));
		}
		else if (Browser==2)  
	    {
		  x = 100*document.getElementById(Obrazok).style.MozOpacity + ((Pridavam==1) ? Krok : -Krok );
		  document.getElementById(Obrazok).style.MozOpacity = 0.01*((x<0)?0:((x>100)?100:x));
		}
		if ((x>0)&&(x<100))
          loopID[Obrazok]=setTimeout('ZmenIntenzitu('+Pridavam+',\''+Obrazok+'\','+Krok+')',Rychlost);
  	  }

  	  function Vysviet(Obrazok,Krok,obr)
	  {
	    if (Browser==0)
		  document.getElementById(Obrazok).src=obr.src;
		else  
		{
		  if (loopID[Obrazok]!=null) 
		    clearTimeout(loopID[Obrazok]);
 	      loopID[Obrazok]=setTimeout("ZmenIntenzitu(1,'"+Obrazok+"',"+Krok+")",0);
		}
	  }

  	  function Zhasni(Obrazok,Krok,obr)
	  {
	    if (Browser==0)
		  document.getElementById(Obrazok).src=obrc.src;
		else  
		{
		  if (loopID[Obrazok]!=null) 
		    clearTimeout(loopID[Obrazok]);
  	      loopID[Obrazok]=setTimeout("ZmenIntenzitu(0,'"+Obrazok+"',"+Krok+")",0);
		}
	  }