The map got lost after I added infoboxes to the markers

Question

Hello,

I wanted to add infoboxes to my markers on Google Map First, before adding them, all the markers were visible on the map, but after I added the following code the map got lost, only the infoboxes can be seen Here is my code:

 else if (allincid != "" && spl.length != 0) {
         //   alert("spl.length" + spl.length);

            var markers = [];
            var loc = [];
            var infowindow = new google.maps.InfoWindow();

            for (var i = 0; i < spl.length; i++) {

                var element = spl[i];
                var lat = element.substr(0, 9);
                var latit = parseFloat(lat);
                // alert(latit);

                var lon = element.substr(10, 15);
                var longit = parseFloat(lon);
                // alert(latit + "," + longit);

                loc[i] = new google.maps.LatLng(latit, longit);

                var marker = new google.maps.Marker({
                    position: loc[i],
                    map: map,
                    title: name1[i],
                    visible: true
                });

               
                boxText = document.createElement("div"),
                                   infoboxOptions = {
                                       content: boxText,
                                       disableAutoPan: false,
                                       maxWidth: 0,
                                       pixelOffset: new google.maps.Size(-60, 0),
                                       zIndex: null,
                                       boxStyle: {
                                           background: "url('http://google-maps-utility-library-v3.googlecode.com/svn/trunk/infobox/examples/tipbox.gif') no-repeat",
                                           opacity: 0.75,
                                           width: "70px"
                                       },
                                       closeBoxMargin: "10px 4px 2px 2px",
                                       closeBoxURL: "http://www.google.com/intl/en_us/mapfiles/close.gif",
                                       infoBoxClearance: new google.maps.Size(1, 1),
                                       isHidden: false,
                                       pane: "floatPane",
                                       enableEventPropagation: false
                                   };
                markers.push(marker);
                boxText.style.cssText = "border: 1px solid black; margin-top: 4px; text-wrap:unrestricted; background:#f9eef0; color:#000000; font-family:Arial; font-size:10px; padding: 5px; border-radius:6px; -webkit-border-radius:6px; -moz-border-radius:6px;";
                boxText.innerHTML = '<div id="content">'  + name1[i]+ '</b>';
                markers[i].infobox = new InfoBox(infoboxOptions);
                markers[i].infobox.open(map, marker);
                google.maps.event.addListener(marker, 'click', (function (marker, i) {
                    return function () {
                        markers[i].infobox.open(map, this);
                        map.panTo(markerData[i].latLng);
                    }
                })(marker, i));

                markers.push(marker);
               
                markers[i].setMap(map);
            }

Can anybody help me please how to retrieve the map again?
Thanks