function showAdvSearch(){
    
    if(document.getElementById('advanced_search').style.display == "block"){
        hide('advanced_search');
    }
    else{
        show('advanced_search', 'block');
    }
}

function show(id, how){
    
    document.getElementById(id).className='';
    
    if (navigator.appName == 'Microsoft Internet Explorer') {
        element=document.getElementById(id).style;
        element.display = 'block';
    }
    else {
        element=document.getElementById(id).style;
        element.display = how;
    }
}

function hide(id){
    
    element=document.getElementById(id).style;
    element.display = 'none';
}

    var current_id = document.getElementById('ic');

function ret(id){
    
    if(current_id == id){
        current_id = id;
        return true;
    }
    else{
        current_id = id;
        return false;
    }
    
}

function switchChangebox(id){
    
    var obj1 = document.getElementById('changebox_home1');
    var obj2 = document.getElementById('changebox_home2');
    var obj3 = document.getElementById('changebox_home3');
    var obj4 = document.getElementById('changebox_home4');
    var obj5 = document.getElementById('changebox_home5');
    
    if(!id){
        
        if(obj1)  document.getElementById('changebox_home1').className = 'ic';
        if(obj2)  document.getElementById('changebox_home2').className = 'hidden';
        if(obj3)  document.getElementById('changebox_home3').className = 'hidden';
        if(obj4)  document.getElementById('changebox_home4').className = 'hidden';
        if(obj5)  document.getElementById('changebox_home5').className = 'hidden';

        if(obj1)  document.getElementById('poradnik1').className = 'poradnik sel';
        if(obj2)  document.getElementById('poradnik2').className = 'poradnik';
        if(obj3)  document.getElementById('poradnik3').className = 'poradnik';
        if(obj4)  document.getElementById('poradnik4').className = 'poradnik';
        if(obj5)  document.getElementById('poradnik5').className = 'poradnik';

    }
    
    if(id == "changebox_home1"){
    
        if(obj1)  document.getElementById('changebox_home1').className = 'ic';
        if(obj2)  document.getElementById('changebox_home2').className = 'hidden';
        if(obj3)  document.getElementById('changebox_home3').className = 'hidden';
        if(obj4)  document.getElementById('changebox_home4').className = 'hidden';
        if(obj5)  document.getElementById('changebox_home5').className = 'hidden';

        if(obj1)  document.getElementById('poradnik1').className = 'poradnik sel';
        if(obj2)  document.getElementById('poradnik2').className = 'poradnik';
        if(obj3)  document.getElementById('poradnik3').className = 'poradnik';
        if(obj4)  document.getElementById('poradnik4').className = 'poradnik';
        if(obj5)  document.getElementById('poradnik5').className = 'poradnik';

    }
    if(id == "changebox_home2"){
        
        if(obj1)  document.getElementById('changebox_home1').className = 'hidden';
        if(obj2)  document.getElementById('changebox_home2').className = 'ic';
        if(obj3)  document.getElementById('changebox_home3').className = 'hidden';
        if(obj4)  document.getElementById('changebox_home4').className = 'hidden';
        if(obj5)  document.getElementById('changebox_home5').className = 'hidden';

        if(obj1)  document.getElementById('poradnik1').className = 'poradnik';
        if(obj2)  document.getElementById('poradnik2').className = 'poradnik sel';
        if(obj3)  document.getElementById('poradnik3').className = 'poradnik';
        if(obj4)  document.getElementById('poradnik4').className = 'poradnik';
        if(obj5)  document.getElementById('poradnik5').className = 'poradnik';
        
    }
    if(id == "changebox_home3"){
        
        if(obj1)  document.getElementById('changebox_home1').className = 'hidden';
        if(obj2)  document.getElementById('changebox_home2').className = 'hidden';
        if(obj3)  document.getElementById('changebox_home3').className = 'ic';
        if(obj4)  document.getElementById('changebox_home4').className = 'hidden';
        if(obj5)  document.getElementById('changebox_home5').className = 'hidden';

        if(obj1)  document.getElementById('poradnik1').className = 'poradnik';
        if(obj2)  document.getElementById('poradnik2').className = 'poradnik';
        if(obj3)  document.getElementById('poradnik3').className = 'poradnik sel';
        if(obj4)  document.getElementById('poradnik4').className = 'poradnik';
        if(obj5)  document.getElementById('poradnik5').className = 'poradnik';

    }

    if(id == "changebox_home4"){

        if(obj1)  document.getElementById('changebox_home1').className = 'hidden';
        if(obj2)  document.getElementById('changebox_home2').className = 'hidden';
        if(obj3)  document.getElementById('changebox_home3').className = 'hidden';
        if(obj4)  document.getElementById('changebox_home4').className = 'ic';
        if(obj5)  document.getElementById('changebox_home5').className = 'hidden';

        if(obj1)  document.getElementById('poradnik1').className = 'poradnik';
        if(obj2)  document.getElementById('poradnik2').className = 'poradnik';
        if(obj3)  document.getElementById('poradnik3').className = 'poradnik';
        if(obj4)  document.getElementById('poradnik4').className = 'poradnik sel';
        if(obj5)  document.getElementById('poradnik5').className = 'poradnik';

    }

    if(id == "changebox_home5"){

        if(obj1)  document.getElementById('changebox_home1').className = 'hidden';
        if(obj2)  document.getElementById('changebox_home2').className = 'hidden';
        if(obj3)  document.getElementById('changebox_home3').className = 'hidden';
        if(obj4)  document.getElementById('changebox_home4').className = 'hidden';
        if(obj5)  document.getElementById('changebox_home5').className = 'ic';

        if(obj1)  document.getElementById('poradnik1').className = 'poradnik';
        if(obj2)  document.getElementById('poradnik2').className = 'poradnik';
        if(obj3)  document.getElementById('poradnik3').className = 'poradnik';
        if(obj4)  document.getElementById('poradnik4').className = 'poradnik';
        if(obj5)  document.getElementById('poradnik5').className = 'poradnik sel';

    }
    
    return false;
    
}
function autoswitchChangebox(arg, stop){
        
        var b2;
        
        var obj1 = document.getElementById('changebox_home1');
        var obj2 = document.getElementById('changebox_home2');
        var obj3 = document.getElementById('changebox_home3');
        var obj4 = document.getElementById('changebox_home4');
        var obj5 = document.getElementById('changebox_home5');
        
        if(obj1)    var max = 1;
        if(obj2)    var max = 2;
        if(obj3)    var max = 3;
        if(obj4)    var max = 4;
        if(obj5)    var max = 5;
        
        if(arg)
        {
            if(isInteger(arg) == true) var b = arg;
             else var b = 2;
        }
        
        if(arg > max){
            var b = 1;
        }
        
        if(!arg)
        {
            var b = 2;
        }
        
        if(stop){        
            timer = clearTimeout(timer);
        }
        b2 = b+1;
        
        if(obj2 || obj3 || obj4 || obj5)
        {
            timer = setTimeout('switchChangebox("changebox_home' + b + '"); autoswitchChangebox(' + b2 + ');', 10000);
        }
    
}

function stepChangebox(direction){ 
 
     var selected_id = ""; 
 
     var min = 1; 
 
     var obj1 = document.getElementById('changebox_home1'); 
     var obj2 = document.getElementById('changebox_home2'); 
     var obj3 = document.getElementById('changebox_home3');
     var obj4 = document.getElementById('changebox_home4');
     var obj5 = document.getElementById('changebox_home5');
     
     if(obj1) var max = 1; 
     if(obj2) var max = 2; 
     if(obj3) var max = 3;
     if(obj4) var max = 4;
     if(obj5) var max = 5;
 
     if(obj1) if(obj1.className == "ic")    selected_id = 1; 
     if(obj2) if(obj2.className == "ic")    selected_id = 2; 
     if(obj3) if(obj3.className == "ic")    selected_id = 3;
     if(obj4) if(obj4.className == "ic")    selected_id = 4;
     if(obj5) if(obj5.className == "ic")    selected_id = 5;
 
     if(direction == "next"){ 
         var a = selected_id + 1; 
         var b = selected_id + 2; 
 
         if(a > max) a = max; 
         if(b > max) b = max; 
         if(a < min) a = 1; 
 
         switchChangebox("changebox_home" + a); 
         autoswitchChangebox(b); 
 
     } 
     if(direction == "prev"){ 
         var a = selected_id - 1; 
         var b = selected_id; 
 
         if(a > max) a = max; 
         if(a < min) a = 1;     
 
         switchChangebox("changebox_home" + a); 
         autoswitchChangebox(b); 
     } 
     
     return false;
 
 }
 

function isUnsignedInteger(s) {
    return (s.toString().search(/^[0-9]+$/) == 0);
}

function isInteger(s) {
    return (s.toString().search(/^-?[0-9]+$/) == 0);
}

function switch_actuals()
{
    var trida = document.getElementById('aktuality').className;
    
    if(trida == 'packed') 
    {
        document.getElementById('aktuality').className = 'unpacked';
        document.getElementById('sipka').src = './img/aktuality-down.png';
    }
    else 
    {
        document.getElementById('aktuality').className = 'packed';
        document.getElementById('sipka').src = './img/aktuality-up.png';
    }
    
    return false;
}

function switch_dontmiss()
{
    var trida = document.getElementById('dontmiss').className;
    
    if(trida == 'content') 
    {
        document.getElementById('dontmiss').className = 'container_hidden';
        document.getElementById('krizek').src = './img/sipka.jpg';
    }
    else 
    {
        document.getElementById('dontmiss').className = 'content';
        document.getElementById('krizek').src = './img/x.png';
    }
    
    return false;
}