function img_act(imgName) {
	if(browser){
		imgOn = eval(imgName+"on.src");
		document[imgName].src = imgOn;
	}
}

function img_inact(imgName) 
{
	if(browser){
		imgOff = eval(imgName+"off.src");
		document[imgName].src = imgOff;
	}
}

var ns = false;                                                
var browser = navigator.userAgent.substring(0,9);      
if (browser == "Mozilla/3" || browser == "Mozilla/4") ns = true;

var dot_normal , dot_hot;
if (ns){
   dot_normal = new Image (17,14);
   dot_normal.src = "image/sipka.gif";
  
   dot_hot = new Image (17,14);
   dot_hot.src = "image/sipka1.gif";
}

function switchimage (imagename, target)
{
   if (ns) document.images[imagename].src = target.src;
}

   function instruct1() { javascript:oblibene('http://www.ju-jitsu.cz/','BUDOKAN PRAHA - judo, ju-jitsu, karate, sebeobrana'); }
   // nic

   bws = navigator.appName;
   vrz = parseInt(navigator.appVersion);
   if ((bws == "Netscape" && vrz >= 3) || (bws == "Microsoft Internet Explorer" && vrz >= 4)) testing=1;
   else testing=0;

function oblibene(page,title) //pridat k oblibenym
{
	if(navigator.appName == "Netscape")
	{
		window.alert('Protože používáte prohlížeč Netscape musíte stitknout kombinaci kláves Ctrl + D pro přidání těchto stránek k oblíbeným položkám.');
	}
	else
	{
		window.external.AddFavorite(page,title);
	}
}