function uprav_vysku_bloku(vzor, cil) {
  var vyska_divu = document.getElementById(vzor).offsetHeight;
  var vyska_ciloveho_divu = document.getElementById(cil).offsetHeight;

  if(vyska_divu > vyska_ciloveho_divu) {
    document.getElementById(cil).style.height = vyska_divu + 'px';
  }
}

function openWin(url, winWidth, winHeight, winRes) {
  if (winRes==1) { stat="resizable=1,scrollbars=1"; }
  else { stat="resizable=0,scrollbars=0"; };
  
  // calculate centered window position
  winLeft = Math.round((screen.width-winWidth)/2);
  winTop  = Math.round((screen.availHeight-winHeight)/2);
  winDef = "left="+winLeft+",top="+winTop+",height="+winHeight+",width="+winWidth+",directories=no,location=no,menubar=no,status=no,toolbar=no,"+stat;
  window.open(url, "", winDef);
}

function number_format(number, decimals, dec_point, thousands_sep) {
    var n = number, c = isNaN(decimals = Math.abs(decimals)) ? 2 : decimals;
    var d = dec_point == undefined ? "." : dec_point;
    var t = thousands_sep == undefined ? "," : thousands_sep, s = n < 0 ? "-" : "";
    var i = parseInt(n = Math.abs(+n || 0).toFixed(c)) + "", j = (j = i.length) > 3 ? j % 3 : 0;
    
    return s + (j ? i.substr(0, j) + t : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + t) + (c ? d + Math.abs(n - i).toFixed(c).slice(2) : "");
}

function empty( mixed_var ) {
  return ( mixed_var === "" || mixed_var === 0   || mixed_var === "0" || mixed_var === null  || mixed_var === false  ||  ( is_array(mixed_var) && mixed_var.length === 0 ) );
}

function is_array(mixed_var) {
  return (mixed_var instanceof Array);
}

function explode(delimiter, string, limit) { 
    var emptyArray = { 0: '' };
    
    // third argument is not required
    if ( arguments.length < 2
        || typeof arguments[0] == 'undefined'
        || typeof arguments[1] == 'undefined' )
    {
        return null;
    }
 
    if ( delimiter === ''
        || delimiter === false
        || delimiter === null )
    {
        return false;
    }
 
    if ( typeof delimiter == 'function'
        || typeof delimiter == 'object'
        || typeof string == 'function'
        || typeof string == 'object' )
    {
        return emptyArray;
    }
 
    if ( delimiter === true ) {
        delimiter = '1';
    }
    
    if (!limit) {
        return string.toString().split(delimiter.toString());
    } else {
        // support for limit argument
        var splitted = string.toString().split(delimiter.toString());
        var partA = splitted.splice(0, limit - 1);
        var partB = splitted.join(delimiter.toString());
        partA.push(partB);
        return partA;
    }
}


function date (format, timestamp) {
    var a, jsdate=((timestamp) ? new Date(timestamp*1000) : new Date());
    var pad = function(n, c){
        if( (n = n + "").length < c ) {
            return new Array(++c - n.length).join("0") + n;
        } else {
            return n;
        }
    };
    var txt_weekdays = ["Sunday","Monday","Tuesday","Wednesday",
        "Thursday","Friday","Saturday"];
    var txt_ordin = {1:"st",2:"nd",3:"rd",21:"st",22:"nd",23:"rd",31:"st"};
    var txt_months =  ["", "January", "February", "March", "April",
        "May", "June", "July", "August", "September", "October", "November",
        "December"];

    var f = {
        // Day
            d: function(){
                return pad(f.j(), 2);
            },
            D: function(){
                t = f.l(); return t.substr(0,3);
            },
            j: function(){
                return jsdate.getDate();
            },
            l: function(){
                return txt_weekdays[f.w()];
            },
            N: function(){
                return f.w() + 1;
            },
            S: function(){
                return txt_ordin[f.j()] ? txt_ordin[f.j()] : 'th';
            },
            w: function(){
                return jsdate.getDay();
            },
            z: function(){
                return (jsdate - new Date(jsdate.getFullYear() + "/1/1")) / 864e5 >> 0;
            },

        // Week
            W: function(){
                var a = f.z(), b = 364 + f.L() - a;
                var nd2, nd = (new Date(jsdate.getFullYear() + "/1/1").getDay() || 7) - 1;

                if(b <= 2 && ((jsdate.getDay() || 7) - 1) <= 2 - b){
                    return 1;
                } else{

                    if(a <= 2 && nd >= 4 && a >= (6 - nd)){
                        nd2 = new Date(jsdate.getFullYear() - 1 + "/12/31");
                        return date("W", Math.round(nd2.getTime()/1000));
                    } else{
                        return (1 + (nd <= 3 ? ((a + nd) / 7) : (a - (7 - nd)) / 7) >> 0);
                    }
                }
            },

        // Month
            F: function(){
                return txt_months[f.n()];
            },
            m: function(){
                return pad(f.n(), 2);
            },
            M: function(){
                t = f.F(); return t.substr(0,3);
            },
            n: function(){
                return jsdate.getMonth() + 1;
            },
            t: function(){
                var n;
                if( (n = jsdate.getMonth() + 1) == 2 ){
                    return 28 + f.L();
                } else{
                    if( n & 1 && n < 8 || !(n & 1) && n > 7 ){
                        return 31;
                    } else{
                        return 30;
                    }
                }
            },

        // Year
            L: function(){
                var y = f.Y();
                return (!(y & 3) && (y % 1e2 || !(y % 4e2))) ? 1 : 0;
            },
            //o not supported yet
            Y: function(){
                return jsdate.getFullYear();
            },
            y: function(){
                return (jsdate.getFullYear() + "").slice(2);
            },

        // Time
            a: function(){
                return jsdate.getHours() > 11 ? "pm" : "am";
            },
            A: function(){
                return f.a().toUpperCase();
            },
            B: function(){
                // peter paul koch:
                var off = (jsdate.getTimezoneOffset() + 60)*60;
                var theSeconds = (jsdate.getHours() * 3600) +
                                 (jsdate.getMinutes() * 60) +
                                  jsdate.getSeconds() + off;
                var beat = Math.floor(theSeconds/86.4);
                if (beat > 1000) beat -= 1000;
                if (beat < 0) beat += 1000;
                if ((String(beat)).length == 1) beat = "00"+beat;
                if ((String(beat)).length == 2) beat = "0"+beat;
                return beat;
            },
            g: function(){
                return jsdate.getHours() % 12 || 12;
            },
            G: function(){
                return jsdate.getHours();
            },
            h: function(){
                return pad(f.g(), 2);
            },
            H: function(){
                return pad(jsdate.getHours(), 2);
            },
            i: function(){
                return pad(jsdate.getMinutes(), 2);
            },
            s: function(){
                return pad(jsdate.getSeconds(), 2);
            },
            //u not supported yet

        // Timezone
            //e not supported yet
            //I not supported yet
            O: function(){
               var t = pad(Math.abs(jsdate.getTimezoneOffset()/60*100), 4);
               if (jsdate.getTimezoneOffset() > 0) t = "-" + t; else t = "+" + t;
               return t;
            },
            P: function(){
                var O = f.O();
                return (O.substr(0, 3) + ":" + O.substr(3, 2));
            },
            //T not supported yet
            //Z not supported yet

        // Full Date/Time
            c: function(){
                return f.Y() + "-" + f.m() + "-" + f.d() + "T" + f.h() + ":" + f.i() + ":" + f.s() + f.P();
            },
            //r not supported yet
            U: function(){
                return Math.round(jsdate.getTime()/1000);
            }
    };

    return format.replace(/[\\]?([a-zA-Z])/g, function(t, s){
        if( t!=s ){
            // escaped
            ret = s;
        } else if( f[s] ){
            // a date function exists
            ret = f[s]();
        } else{
            // nothing special
            ret = s;
        }

        return ret;
    });
}

function mktime() {
    var no, ma = 0, mb = 0, i = 0, d = new Date(), argv = arguments, argc = argv.length;
    d.setHours(0,0,0); d.setDate(1); d.setMonth(1); d.setYear(1972);
 
    var dateManip = {
        0: function(tt){ return d.setHours(tt); },
        1: function(tt){ return d.setMinutes(tt); },
        2: function(tt){ set = d.setSeconds(tt); mb = d.getDate() - 1; return set; },
        3: function(tt){ set = d.setMonth(parseInt(tt)-1); ma = d.getFullYear() - 1972; return set; },
        4: function(tt){ return d.setDate(tt+mb); },
        5: function(tt){ return d.setYear(tt+ma); }
    };
    
    for( i = 0; i < argc; i++ ){
        no = parseInt(argv[i]*1);
        if (isNaN(no)) {
            return false;
        } else {
            // arg is number, let's manipulate date object
            if(!dateManip[i](no)){
                // failed
                return false;
            }
        }
    }

    return Math.floor(d.getTime()/1000);
}

function ukaz_kraj(id) {
  document.getElementById('kraj'+id).style.visibility = 'visible';
}

function schovej_kraj(id) {
  document.getElementById('kraj'+id).style.visibility = 'hidden';
}