// map markers
    var map;
    var markers = [];
    
    // main markers
    markers[1] = [];
    markers[2] = [];
    markers[3] = [];
    markers[4] = [];
    markers[5] = [];
    markers[6] = [];
    markers[7] = [];
    markers[8] = [];
    
    var cur_type = new Array();
    cur_type = {0:false,1:false,2:false,3:false,4:false,5:false,6:false};
    var markers_list = [];
    var markers_source = [];
    var markers_id = [];
    var markers_url = [];
    var markers_xy = [];
    var markers_pcs = [];
    var markers_title = [];
    var markers_text = [];
    var topRight;
    var bottomLeft;
    var scale;
    var detailShow = false;
    var marker_box_x = 12; // default right margin of overlay from marker
    var image1,image2;
          
    // markers in arrays
    markers_source[1] = [49.8862,15.1714,7];
    markers_pcs[1] = 'pcs/loga/logo-7.png';
    markers_title[1] = 'Liberec / Máchova 603/62, 460 07 Liberec';
    markers_id[1] = '64';
    markers_url[1] = 'x-18';
    markers_source[2] = [48.8227,14.3293,8];
    markers_pcs[2] = 'pcs/loga/logo-8.png';
    markers_title[2] = 'Český Krumlov / Budějovická 179, 381 01 Český Krumlov';
    markers_id[2] = '63';
    markers_url[2] = 'cesky-krumlov';
    markers_source[3] = [49.2687,13.9191,8];
    markers_pcs[3] = 'pcs/loga/logo-8.png';
    markers_title[3] = 'Strakonice / Písecká 285, 386 01 Strakonice';
    markers_id[3] = '62';
    markers_url[3] = 'strakonice';
    markers_source[4] = [49.4048,14.6873,8];
    markers_pcs[4] = 'pcs/loga/logo-8.png';
    markers_title[4] = 'Tábor / Měšická 1724, 390 02 Tábor';
    markers_id[4] = '61';
    markers_url[4] = 'tabor';
    markers_source[5] = [49.3156,14.1362,8];
    markers_pcs[5] = 'pcs/loga/logo-8.png';
    markers_title[5] = 'Písek / Pražská 286, Písek';
    markers_id[5] = '60';
    markers_url[5] = 'aspera-pisek';
    markers_source[6] = [49.4097,15.2207,8];
    markers_pcs[6] = 'pcs/loga/logo-8.png';
    markers_title[6] = 'Pelhřimov / K Silu 1154, Pelhřimov';
    markers_id[6] = '59';
    markers_url[6] = 'aspera-pelhrimov';
    markers_source[7] = [49.8305,18.2449,8];
    markers_pcs[7] = 'pcs/loga/logo-8.png';
    markers_title[7] = 'Ostrava / Novoveská 2065/5f Ostrava';
    markers_id[7] = '58';
    markers_url[7] = 'aspera-ostrava';
    markers_source[8] = [50.4992,13.6307,8];
    markers_pcs[8] = 'pcs/loga/logo-8.png';
    markers_title[8] = 'Most / Tyršova 1172, Most ';
    markers_id[8] = '57';
    markers_url[8] = 'aspera-most';
    markers_source[9] = [50.4111,14.9292,8];
    markers_pcs[9] = 'pcs/loga/logo-8.png';
    markers_title[9] = 'Mladá Boleslav / Jičínská 414, Mladá Boleslav';
    markers_id[9] = '56';
    markers_url[9] = 'aspera-mlada-boleslav';
    markers_source[10] = [50.7603,15.0274,8];
    markers_pcs[10] = 'pcs/loga/logo-8.png';
    markers_title[10] = 'Liberec / Švermova 268/76, Liberec';
    markers_id[10] = '52';
    markers_url[10] = 'aspera-liberec';
    markers_source[11] = [49.4277,15.5967,8];
    markers_pcs[11] = 'pcs/loga/logo-8.png';
    markers_title[11] = 'Jihlava / U Rybníka 10, Jihlava';
    markers_id[11] = '55';
    markers_url[11] = 'aspera-jihlava';
    markers_source[12] = [49.6704,18.333,8];
    markers_pcs[12] = 'pcs/loga/logo-8.png';
    markers_title[12] = 'Frýdek-Místek / Příborská 1585, Frýdek-Místek';
    markers_id[12] = '54';
    markers_url[12] = 'aspera-frydek-mistek';
    markers_source[13] = [49.7717,14.6806,8];
    markers_pcs[13] = 'pcs/loga/logo-8.png';
    markers_title[13] = 'Benešov u Prahy / Křižíkova 766, Benešov u Prahy';
    markers_id[13] = '53';
    markers_url[13] = 'aspera-benesov-u-prahy';
    markers_source[14] = [48.9613,14.4838,8];
    markers_pcs[14] = 'pcs/loga/logo-8.png';
    markers_title[14] = 'Aspera centrála / Křižíkova 734, České Budějovice';
    markers_id[14] = '51';
    markers_url[14] = 'aspera-centrala';
    markers_source[15] = [48.1466,17.8665,6];
    markers_pcs[15] = 'pcs/loga/logo-6.png';
    markers_title[15] = 'ELRON Šaľa / Hlavná 28/62, 927 01 Šaľa ';
    markers_id[15] = '50';
    markers_url[15] = 'elron-sala';
    markers_source[16] = [49.3509,16.0025,7];
    markers_pcs[16] = 'pcs/loga/logo-7.png';
    markers_title[16] = 'Velké Meziříčí - KAMAT IMAO / Třebíčská 774, 594 01 Velké Meziříčí';
    markers_id[16] = '49';
    markers_url[16] = 'kamat-imao';
    markers_source[17] = [50.2461,14.3275,3];
    markers_pcs[17] = 'pcs/loga/logo-3.png';
    markers_title[17] = 'Kralupy nad Vltavou / V Pískovně 2054, 278 01  Kralupy n. V.';
    markers_id[17] = '45';
    markers_url[17] = 'kralupy-nad-vltavou';
    markers_source[18] = [50.1703,12.6488,2];
    markers_pcs[18] = 'pcs/loga/logo-2.png';
    markers_title[18] = 'Sokolov / Vítězná 2045, 356 01';
    markers_id[18] = '20';
    markers_url[18] = 'sokolov';
    markers_source[19] = [50.3559,13.7945,2];
    markers_pcs[19] = 'pcs/loga/logo-2.png';
    markers_title[19] = 'Louny / Na Valích 2906 (vchod z ulice Osvoboditelů), 440 01';
    markers_id[19] = '18';
    markers_url[19] = 'louny';
    markers_source[20] = [49.7367,13.3267,2];
    markers_pcs[20] = 'pcs/loga/logo-2.png';
    markers_title[20] = 'Plzeň / Domažlická 172b, 318 00';
    markers_id[20] = '17';
    markers_url[20] = 'plzen';
    markers_source[21] = [50.7777,14.2129,2];
    markers_pcs[21] = 'pcs/loga/logo-2.png';
    markers_title[21] = 'Děčín – U Plovárny / U Plovárny 1266/7, 405 02';
    markers_id[21] = '44';
    markers_url[21] = 'decin2';
    markers_source[22] = [49.7252,13.4099,7];
    markers_pcs[22] = 'pcs/loga/logo-7.png';
    markers_title[22] = 'Plzeň / Skladová 2438/6, 326 00 Plzeň - Slovany';
    markers_id[22] = '43';
    markers_url[22] = 'plzen-2';
    markers_source[23] = [49.8206,18.1782,7];
    markers_pcs[23] = 'pcs/loga/logo-7.png';
    markers_title[23] = 'Ostrava / Nad Porubkou 2343, 708 00 Ostrava - Poruba';
    markers_id[23] = '42';
    markers_url[23] = 'ostrava-1';
    markers_source[24] = [50.2073,15.8035,7];
    markers_pcs[24] = 'pcs/loga/logo-7.png';
    markers_title[24] = 'Hradec Králové / Pražská třída 880/11a, 500 04 Hradec Králové - Kukleny';
    markers_id[24] = '41';
    markers_url[24] = 'kamat-hradec-kralove';
    markers_source[25] = [49.1635,16.6268,7];
    markers_pcs[25] = 'pcs/loga/logo-7.png';
    markers_title[25] = 'Brno / Sklenářská 716, Horní Heršpice, 619 00 Brno';
    markers_id[25] = '40';
    markers_url[25] = 'brno-1';
    markers_source[26] = [50.1228,14.5841,7];
    markers_pcs[26] = 'pcs/loga/logo-7.png';
    markers_title[26] = 'Praha / K Cihelně 129, 190 15  Praha 9 - Satalice';
    markers_id[26] = '39';
    markers_url[26] = 'praha';
    markers_source[27] = [50.3533,16.1324,7];
    markers_pcs[27] = 'pcs/loga/logo-7.png';
    markers_title[27] = 'Nové Město nad Metují / Kpt. Jaroše 470, 549 01 Nové Město nad Metují – Krčín';
    markers_id[27] = '38';
    markers_url[27] = 'nove-mesto-nad-metuji';
    markers_source[28] = [48.1704,17.1554,6];
    markers_pcs[28] = 'pcs/loga/logo-6.png';
    markers_title[28] = 'ELRON Bratislava / Rožňavská 1, 831 04 Bratislava';
    markers_id[28] = '35';
    markers_url[28] = 'elron-bratislava';
    markers_source[29] = [49.7256,13.4053,5];
    markers_pcs[29] = 'pcs/loga/logo-5.png';
    markers_title[29] = 'Plzeň / Slovanská alej 1960/24, 326 00  Plzeň';
    markers_id[29] = '34';
    markers_url[29] = 'dabok-plzen';
    markers_source[30] = [50.0702,14.3581,5];
    markers_pcs[30] = 'pcs/loga/logo-5.png';
    markers_title[30] = 'Praha / Ke Kotlářce 292/8, 150 00 Praha 5';
    markers_id[30] = '33';
    markers_url[30] = 'dabok-praha';
    markers_source[31] = [50.1776,14.654,3];
    markers_pcs[31] = 'pcs/loga/logo-3.png';
    markers_title[31] = 'Brandýs nad Labem / Pražská 1012/65, 250 01 Brandýs n. L.';
    markers_id[31] = '31';
    markers_url[31] = 'brandys-nad-labem';
    markers_source[32] = [50.1002,14.4522,3];
    markers_pcs[32] = 'pcs/loga/logo-3.png';
    markers_title[32] = 'Praha 7 / Jateční 4, 170 00 Praha 7';
    markers_id[32] = '30';
    markers_url[32] = 'praha-7';
    markers_source[33] = [49.1779,16.6771,4];
    markers_pcs[33] = 'pcs/loga/logo-4.png';
    markers_title[33] = 'Brno / Řípská 1153/20a, 627 00, Brno';
    markers_id[33] = '27';
    markers_url[33] = 'brno';
    markers_source[34] = [48.8527,16.0719,4];
    markers_pcs[34] = 'pcs/loga/logo-4.png';
    markers_title[34] = 'Znojmo / Dobšická 3697/6, 669 02, Znojmo';
    markers_id[34] = '26';
    markers_url[34] = 'znojmo';
    markers_source[35] = [49.3509,18.2433,4];
    markers_pcs[35] = 'pcs/loga/logo-4.png';
    markers_title[35] = 'Karolinka / Vsetínská 415, 756 05 Karolinka';
    markers_id[35] = '25';
    markers_url[35] = 'karolinka';
    markers_source[36] = [49.3416,17.9774,4];
    markers_pcs[36] = 'pcs/loga/logo-4.png';
    markers_title[36] = 'Vsetín / Potůčky 1677, 755 01';
    markers_id[36] = '24';
    markers_url[36] = 'vsetin';
    markers_source[37] = [49.8495,18.2812,4];
    markers_pcs[37] = 'pcs/loga/logo-4.png';
    markers_title[37] = 'Ostrava / Sokolská třída 101, 702 00';
    markers_id[37] = '23';
    markers_url[37] = 'ostrava';
    markers_source[38] = [49.5903,17.2546,4];
    markers_pcs[38] = 'pcs/loga/logo-4.png';
    markers_title[38] = 'Olomouc – prodejna / Kateřinská 15, 772 00';
    markers_id[38] = '22';
    markers_url[38] = 'olomouc-prodejna';
    markers_source[39] = [49.5861,17.273,4];
    markers_pcs[39] = 'pcs/loga/logo-4.png';
    markers_title[39] = 'Olomouc / Tovární 45, 772 00';
    markers_id[39] = '21';
    markers_url[39] = 'olomouc';
    markers_source[40] = [50.7774,14.2352,2];
    markers_pcs[40] = 'pcs/loga/logo-2.png';
    markers_title[40] = 'Děčín – Folknářská / Folknářská 1246/21, 405 01';
    markers_id[40] = '16';
    markers_url[40] = 'decin';
    markers_source[41] = [50.6804,14.543,2];
    markers_pcs[41] = 'pcs/loga/logo-2.png';
    markers_title[41] = 'Česká Lípa / Mimoňská 3385, 470 01';
    markers_id[41] = '15';
    markers_url[41] = 'ceska-lipa-elex';
    markers_source[42] = [50.4604,13.4246,2];
    markers_pcs[42] = 'pcs/loga/logo-2.png';
    markers_title[42] = 'Chomutov / Tovární 5954, 430 01';
    markers_id[42] = '14';
    markers_url[42] = 'chomutov';
    markers_source[43] = [50.7821,14.2134,2];
    markers_pcs[43] = 'pcs/loga/logo-2.png';
    markers_title[43] = 'Teplice / Duchcovská 433, 415 01 (areál Perla)';
    markers_id[43] = '13';
    markers_url[43] = 'teplice';
    markers_source[44] = [50.6477,13.7643,2];
    markers_pcs[44] = 'pcs/loga/logo-2.png';
    markers_title[44] = 'Košťany / Teplická ul. 443, 417 23';
    markers_id[44] = '12';
    markers_url[44] = 'kostany';
    markers_source[45] = [50.7604,14.5565,1];
    markers_pcs[45] = 'pcs/loga/logo-1.png';
    markers_title[45] = 'Obchodní dům JAKUB / Liberecká 66, 473 01';
    markers_id[45] = '11';
    markers_url[45] = 'obchodni-dum-jakub';
    markers_source[46] = [50.662,14.0304,1];
    markers_pcs[46] = 'pcs/loga/logo-1.png';
    markers_title[46] = 'Ústí nad Labem / Špitálské nám. 10, 400 01';
    markers_id[46] = '10';
    markers_url[46] = 'usti-nad-labem';
    markers_source[47] = [50.7794,14.5442,1];
    markers_pcs[47] = 'pcs/loga/logo-1.png';
    markers_title[47] = 'Nový Bor / Gen. Svobody 297, 473 01';
    markers_id[47] = '3';
    markers_url[47] = 'novy-bor';
    markers_source[48] = [50.519,14.1382,1];
    markers_pcs[48] = 'pcs/loga/logo-1.png';
    markers_title[48] = 'Litoměřice / Želetická ul. 1929/13, 412 01';
    markers_id[48] = '8';
    markers_url[48] = 'litomerice';
    markers_source[49] = [50.7605,15.0275,1];
    markers_pcs[49] = 'pcs/loga/logo-1.png';
    markers_title[49] = 'Liberec / Švermova 268/76';
    markers_id[49] = '6';
    markers_url[49] = 'liberec';
    markers_source[50] = [50.2181,15.869,1];
    markers_pcs[50] = 'pcs/loga/logo-1.png';
    markers_title[50] = 'Hradec Králové / Bieblova 344/8, 500 03';
    markers_id[50] = '7';
    markers_url[50] = 'jakub-hradec-kralove';
    markers_source[51] = [48.8533,17.1302,1];
    markers_pcs[51] = 'pcs/loga/logo-1.png';
    markers_title[51] = 'Hodonín / Štefánikova 27, 695 01';
    markers_id[51] = '5';
    markers_url[51] = 'hodonin';
    markers_source[52] = [50.6771,14.5246,1];
    markers_pcs[52] = 'pcs/loga/logo-1.png';
    markers_title[52] = 'Česká Lípa / Dubická 959, 470 01';
    markers_id[52] = '2';
    markers_url[52] = 'ceska-lipa';
    markers_source[53] = [50.1094,14.5423,3];
    markers_pcs[53] = 'pcs/loga/logo-3.png';
    markers_title[53] = 'Elkas centrála / Kolbenova 568/29, 198 00  Praha 9';
    markers_id[53] = '36';
    markers_url[53] = 'elkas-centrala';
    
    function initialize() {
       
      var styles = [{"featureType":"all","stylers":[{"saturation":100},{"hue":"#014694"}]},{"featureType":"road","stylers":[{"saturation":-40}]},{"featureType":"transit","stylers":[{"visibility":"off"}]},{"featureType":"poi","stylers":[{"visibility":"off"}]},{"featureType":"water","stylers":[{"visibility":"simplified"},{"saturation":-60}]}];
      var styledMap = new google.maps.StyledMapType(styles,
         {name: "Styled Map"});
      var map_canvas = document.getElementById('map_canvas');
         
      var myLatLng = new google.maps.LatLng(49.879419, 14.576879);
      var mapOptions = {
        zoom: 7,
        center: myLatLng,
        scrollwheel: false,
        mapTypeId: google.maps.MapTypeId.ROADMAP
      };
      map = new google.maps.Map(document.getElementById('map_canvas'),mapOptions);
      map.mapTypes.set('map_style', styledMap);
      map.setMapTypeId('map_style');
      
      // pois markers
      var anchorTop = 15;
      var anchorLeft = 15;
      var originTop = 0;
      var originLeft = 0;
      
      image1 = new google.maps.MarkerImage('pcs/marker-small.png',
        new google.maps.Size(35, 35),
        new google.maps.Point(originLeft,originTop),
        new google.maps.Point(anchorLeft,anchorTop)
      );
      
      image2 = new google.maps.MarkerImage('pcs/marker-small.png',
        new google.maps.Size(35, 35),
        new google.maps.Point(originLeft,originTop),
        new google.maps.Point(anchorLeft,anchorTop)
      );
      
      image3 = new google.maps.MarkerImage('pcs/marker-small.png',
        new google.maps.Size(35, 35),
        new google.maps.Point(originLeft,originTop),
        new google.maps.Point(anchorLeft,anchorTop)
      );
      
      image4 = new google.maps.MarkerImage('pcs/marker-big.png',
        new google.maps.Size(35, 35),
        new google.maps.Point(originLeft,originTop),
        new google.maps.Point(anchorLeft,anchorTop)
      );
      
      image5 = new google.maps.MarkerImage('pcs/marker-small.png',
        new google.maps.Size(35, 35),
        new google.maps.Point(originLeft,originTop),
        new google.maps.Point(anchorLeft,anchorTop)
      );
      
      image6 = new google.maps.MarkerImage('pcs/marker-small.png',
        new google.maps.Size(35, 35),
        new google.maps.Point(originLeft,originTop),
        new google.maps.Point(anchorLeft,anchorTop)
      );
      
      image7 = new google.maps.MarkerImage('pcs/marker-small.png',
        new google.maps.Size(35, 35),
        new google.maps.Point(originLeft,originTop),
        new google.maps.Point(anchorLeft,anchorTop)
      );

      image8 = new google.maps.MarkerImage('pcs/marker-small.png',
        new google.maps.Size(35, 35),
        new google.maps.Point(originLeft,originTop),
        new google.maps.Point(anchorLeft,anchorTop)
      );
      
      for (var key in markers_source) {
        addMarker(key,markers_source[key][0],markers_source[key][1],markers_source[key][2]);
      }

      // listener on idle map -> recalculate position all markers
      google.maps.event.addListener(map, 'idle', function() {
        // get map x,y
        topRight = map.getProjection().fromLatLngToPoint(map.getBounds().getNorthEast());
        bottomLeft = map.getProjection().fromLatLngToPoint(map.getBounds().getSouthWest());
        scale = Math.pow(2,map.getZoom());
        
        // get marker x,y
        for (var i = 1; i < markers_list.length; i++) {
          worldPoint = map.getProjection().fromLatLngToPoint(markers_list[i].getPosition());
          markers_xy[i] = new google.maps.Point((worldPoint.x-bottomLeft.x)*scale,(worldPoint.y-topRight.y)*scale);
        }
      });
      
      // hide overlay if move map
      google.maps.event.addListener(map, 'center_changed', function() {
        $("#overlay").hide();
      });
      
      // hide overlay if zoom change
      google.maps.event.addListener(map, 'zoom_changed', function() {
        $("#overlay").hide();
      });
      
      var bounds = new google.maps.LatLngBounds(
        new google.maps.LatLng(48.805782, 13.382116),
        new google.maps.LatLng(51.061080, 15.788122)
      );
        
      google.maps.event.addDomListener(window, 'resize', function() {
        map.fitBounds(bounds);
      });
    
    }
    
    // add marker
    function addMarker(id,lat,lon,poiType) {
    
      markers_list[id] = new google.maps.Marker({
        position: new google.maps.LatLng(lat,lon,true),
        map: map,
        zIndex: parseInt(id),
        icon: eval('image'+poiType)
      });
      
      markers[poiType].push(markers_list[id]);
      
      var showMarkerBubble = new Function("event", "markerBubble("+id+");");
      google.maps.event.addListener(markers_list[id], 'mouseover', showMarkerBubble);
      google.maps.event.addListener(markers_list[id], 'mouseout', function() {
        $("#overlay").hide();
      });
      
      google.maps.event.addListener(markers_list[id], "click", function(event) {
        window.open(markers_url[id],'_self');
      });
      
      //var showDetailBubble = new Function("event", "detailBubble("+id+");");
      //google.maps.event.addListener(markers_list[id], 'click', showDetailBubble);
    }
    
    // load poi data by ajax
    function getPoiDetail(id_poi) {

      var xmlhttp;
    
	  if (window.XMLHttpRequest) {
	    xmlhttp = new XMLHttpRequest();
	  } else {
	    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
	  }
	  
	  xmlhttp.onreadystatechange=function() {
	    if (xmlhttp.readyState==4 && xmlhttp.status==200) {
		  document.getElementById('detail-box').innerHTML = xmlhttp.responseText;
	    }
	  }
	  xmlhttp.open('GET','../ajax/poi-detail.php?id='+id_poi, true);
	  xmlhttp.send();
    }
    
    // function for show detail overlay
    function detailBubble(num) {
      
      $("#detail strong").text(markers_title[num]);
      
      if (!detailShow || detailShow!=num) {
        $("#detail").show();
        getPoiDetail(markers_id[num]);
        detailShow = num;
      } else {
        $("#detail").hide();
        detailShow = false;
        document.getElementById('detail-box').innerHTML = '<div id="loading"></div>';
      }
    }
    
    function clearMapMarkers() {
      clearMarkers(1);
      clearMarkers(2);
      clearMarkers(3);
      clearMarkers(4);
      clearMarkers(5);
      clearMarkers(6);
      clearMarkers(7);
    }
    
    $(document).ready(function() {
      $( "#detail-close" ).click(function(e){
        e.preventDefault();
        $("#detail").hide();
        detailShow = false;
	    document.getElementById('detail-box').innerHTML = '<div id="loading"></div>';
      });
      
      var t = setTimeout(clearMapMarkers, 500);
    });
    
    // function for show markers overlay
    function markerBubble(num) {
      
      $("#overlay strong").text(markers_title[num]);
      $("#overlay div").css("background-image", "url('"+markers_pcs[num]+"')");
      
      if (markers_xy[num].x > ($("#map_canvas").width()-237)) {
        marker_box_x = -225;
        $("#overlay").css("background-image", "url('pcs/map-buble-left-bg.png')");
        $("#overlay").css("padding-left", "10px");
        $("#overlay").css("padding-right", "23px");
      } else {
        marker_box_x = 7;
        $("#overlay").css("background-image", "url('pcs/map-buble-right-bg.png')");
        $("#overlay").css("padding-left", "23px");
        $("#overlay").css("padding-right", "10px");
      }
      $("#overlay").css({
        left:($("#map_canvas").position().left + markers_xy[num].x + marker_box_x),
        top:($("#map_canvas").position().top + markers_xy[num].y - 51)
      });
      $("#overlay").show();
    }
    
    function setMarkersToMap(sendMap,type) {
      if (!type) {
        for (var key in markers) {
          for (var i = 0; i < markers[key].length; i++) {
            markers[key][i].setMap(sendMap);
          }
        }
      } else {
        for (var i = 0; i < markers[type].length; i++) {
          markers[type][i].setMap(sendMap);
        }
      }
    }
    
    // hide markers
    function clearMarkers(type) {
      //alert(type+" --- "+cur_type[type]);
      if (!cur_type[type]) {
        setMarkersToMap(map,type);
        cur_type[type] = true;
        $(".map-icon-"+type).css("background-image", "url('pcs/marker-"+type+".png')");
      } else {
        setMarkersToMap(null,type);
        cur_type[type] = false;
        $(".map-icon-"+type).css("background-image", "url('pcs/marker-"+type+"-off.png')");
      }
    }
    
    // shows markers
    function showOverlays(type) {
      setMarkersToMap(map,type);
    }
    
    // deletes all markers
    function deleteMarkers(type) {
      clearMarkers(type);
      markers[type] = null;
    }
    
    google.maps.event.addDomListener(window, 'load', initialize);
    
    /*
    $(document).ready(function() {
      map.fitBounds(bounds);
    });
    */