tweet search and google map(InvalidValueError: setCenter: not a LatLng or LatLngLiteral: not an Object)

I am trying to show the location in google map when I mouse over to the tweet Result provided an image of the webpage

I using java script to enable the mouse over function

var defaultLocation = new google.maps.LatLng(5.419297, 100.3230233);
var selectedLocation = "";
var query;
var value;
var marker;
$(document).ready(function(){
var mapCanvas;
var map;
var LatLng;
var mapOptions;
refresh();
setInterval(function(){ refresh() }, 60000);

function init(){

    LatLng = defaultLocation;
    mapOptions = {
        center: LatLng,
        zoom: 16,
        mapTypeId: google.maps.MapTypeId.ROADMAP,
        streetViewControl: true
    };
    mapCanvas = document.getElementById("mapCanvas");
    map = new google.maps.Map(mapCanvas, mapOptions);


    //To add marker
    var icon = {
        url: "element3_4/tweetSearch/pointer.png", // url
        scaledSize: new google.maps.Size(50, 50), // scaled size
        origin: new google.maps.Point(0,0), // origin
        anchor: new google.maps.Point(0, 0) // anchor
    };

   var marker = new google.maps.Marker({
      position : LatLng,
        map: map,
      title: "current location",
      icon: icon
   });
   marker.setMap(map);

}

google.maps.event.addDomListener(window, "load", init);

function initSelect(latitude, longitude){
    //LatLng = defaultLocation;
    mapOptions = {
        center: selectedLocation,
        zoom: 16,
        mapTypeId: google.maps.MapTypeId.ROADMAP,
        streetViewControl: true
    };
    mapCanvas = document.getElementById("mapCanvas");
    map = new google.maps.Map(mapCanvas, mapOptions);

    //To add marker
    var icon = {
        url: "element3_4/tweetSearch/pointer.png", // url
        scaledSize: new google.maps.Size(50, 50), // scaled size
        origin: new google.maps.Point(0,0), // origin
        anchor: new google.maps.Point(0, 0) // anchor
    };

   var marker = new google.maps.Marker({
      position : LatLng,
        map: map,
      title: "current location",
      icon: icon
   });
   marker.setMap(map);

}




$("#search").click(function(){
    var query = $("#keyword").val();
    query = $.trim(query);
    if(query != ""){

        search(query);


    }else{
       $("#tweetResult").html("");          
    }   
});


function search(query){
    var url = "element3_4/tweetSearch/search.php";
    $.post(url, {query:query}, function(tweets){
        var geoEnabled = false;
        var user       = "";
        var place      = "";
        var parseStr   = "<table id='searchResult'> ";
            parseStr  += "  <thead>" ;
            parseStr  += "    <tr>"; 
            parseStr  += "      <th>Image</th> ";
            parseStr  += "      <th>Name</th> ";
            parseStr  += "      <th>Tweet</th> ";
            parseStr  += "      <th>Date</th>"; 
            parseStr  += "    </tr> ";
            parseStr  += "  </thead>"; 
            parseStr  += "<tbody> ";
        $("#tweetResult").html("");

        for(var i=0; i<tweets.statuses.length; i++){
            user = tweets.statuses[i].user.screen_name;
            parseStr += "<tr>";

            parseStr += "<td><img src='"+ tweets.statuses[i].user.profile_image_url + "'alt='"+ user +"'/></td>"; 
            parseStr += " <td>" + user + "</td>";
            parseStr += "<td>"+tweets.statuses[i].text+"</td>";
            parseStr += "<td>"+tweets.statuses[i].created_at+"</td>"; 

            geoEnabled = user.geo_enabled;
            if(geoEnabled){
                place = tweets.statuses[i].place;
                    if(place != null){
                        // place.name
                        // place.country
                        var Lat = parseFloat(place.bounding_box.coordinates[0][0][1]);
                        var Lgt = parseFloat(place.bounding_box.coordinates[0][0][0]);
                        selectedLocation = new google.maps.LatLng(Lat, Lgt); //Mouseover location
                    }else{
                        selectedLocation = "";
                    }
            }else{
                selectedLocation = "";
            }
            parseStr += "<div data-Lat=" + Lat + " data-Lng=" + Lgt + ">" + selectedLocation + "</div>";
            parseStr += "</tr>";            

        }
        parseStr += "</tbody> ";
        parseStr +="</table>";
        $("#tweetResult").append(parseStr);


       $("#tweetResult").mouseenter(function(){


        var LAT = parseFloat($(this).attr("data-Lat"));
        var LGT = parseFloat($(this).attr("data-Lng"));
        console.log(LAT + LGT);

        initSelect(LAT, LGT);

    });

    $("#tweetResult ").mouseleave(function(){
        init();
    });

    });
}

function refresh(){
    var url = "element3_4/tweetSearch/search.php";
    query="cm655";
    $.post(url, {query:query}, function(tweets){
    var geoEnabled = false;
    var user = "";
    var place = "";
    var parseStr = "<table id='searchResult'> ";
        parseStr += "<thead>" ;
        parseStr +=  "<tr>"; 
        parseStr +=                  "<th>Image</th> ";
        parseStr +=                  "<th>Name</th> ";
        parseStr +=                  "<th>Tweet</th> ";
        parseStr +=                  "<th>Date</th>"; 
        parseStr +=                "</tr> ";
        parseStr +=             "</thead>"; 
        parseStr +=          "   <tbody> ";
    $("#tweetResult").html("");

    for(var i=0; i<tweets.statuses.length; i++){
        user = tweets.statuses[i].user.screen_name;
        parseStr += "<tr data-Lat=" + Lat + " data-Lng=" + Lgt + ">";
        parseStr += "<td><img src='"+ tweets.statuses[i].user.profile_image_url + "' alt= '"+ user +"'/></td>"; 
        parseStr += " <td>" + user + "</td>";
        parseStr += "<td>"+tweets.statuses[i].text+"</td>";
        parseStr += "<td>"+tweets.statuses[i].created_at+"</td>"; 


                geoEnabled = user.geo_enabled;
                if(geoEnabled){
                    place = tweets.statuses[i].place;
                    if(place != null){
                        // place.name
                        // place.country
                        var Lat = parseFloat(place.bounding_box.coordinates[0][0][1]);
                        var Lgt = parseFloat(place.bounding_box.coordinates[0][0][0]);
                        selectedLocation = new google.maps.LatLng(Lat, Lgt); //Mouseover location
                    }
                    else{
                        selectedLocation = "";
                    }
                }
                else{
                    selectedLocation = "";
                }                   

                parseStr += "</tr>";



    }
    parseStr += "</tbody> ";
    parseStr +="</table>";
    $("#tweetResult").append(parseStr);


    $("#tweetResult tr").mouseenter(function(){


        var LAT = parseFloat($(this).attr("data-Lat"));
        var LGT = parseFloat($(this).attr("data-Lng"));


        initSelect(LAT, LGT);
    });

    $("#tweetResult tr").mouseleave(function(){
        init();
    });

});
}
});

However, it not trigger the mouse over function as expected. The error show "InvalidValueError: setCenter: not a LatLng or LatLngLiteral: not an Object". Is this means my LatLng is not define?? How can I fix this?