How to check two LatLng values ​​using if condition on google api v3 map?

I designed a map with routes using the DirectionsRenderer ... I need the destination marker to bounce if the source and destination are in the same place ... but when I check if the two LatLng values ​​are the same using IF, the program does not execute IF statement ... the destination token does not receive a rebound .. my encoding

        var myOptions = 
    {
        center: new google.maps.LatLng(default_latitude,default_longitude),
        zoom: 4,
        mapTypeId: google.maps.MapTypeId.ROADMAP
    };

    var map = new google.maps.Map(document.getElementById("map"),myOptions);
    var latlng1=new google.maps.LatLng(glat,glon);
    var latlng2=new google.maps.LatLng(hlat,hlon);

    var marker = new google.maps.Marker({   
            icon: "http://www.googlemapsmarkers.com/v1/B/67BF4B/000000/00902C/", 
            position: new google.maps.LatLng(glat,glon),
            map: map
        });


    var marker1 = new google.maps.Marker({
                icon: " http://www.googlemapsmarkers.com/v1/A/67BF4B/000000/00902C/", 
                position: new google.maps.LatLng(hlat,hlon),
                map: map

            });  

    //THIS IF STATEMENT IS NOT WORKING ... WHAT CAN I USE INSTEAD OF THIS 
        if(latlng1==latlng2)
            marker1.setAnimation(google.maps.Animation.BOUNCE); 



    directionsDisplay.setMap(map);
    directionsDisplay.setPanel(document.getElementById("panel"));
    var request = {
      origin: latlng1,
      destination:latlng2,
      travelMode: google.maps.DirectionsTravelMode.DRIVING
      };

    directionsService.route(request, function(response, status) {
      if (status == google.maps.DirectionsStatus.OK) {
        directionsDisplay.setDirections(response);
       }
    });