Golang template not loading

I am building a Golang web app. When i redirect after sending a JavaScript GET request, http.Redirect runs the function but load the web template.

I have http.Redirect else where i the code and it works fine can you see anything wrong with me code

This is the JavaScript

 function logout() {
    var xmlHttp = new XMLHttpRequest();
    xmlHttp.open("GET", "/logout", true); // true for asynchronous 
    xmlHttp.send();

}

This is the Go function

func lgout(w http.ResponseWriter, req *http.Request) {

in, sess := alreadyLoggedIn(req)

if in == true {
    cookie, _ := req.Cookie("session")
    session, _ := mgo.DialWithInfo(&mgo.DialInfo{
    Addrs: []string{"cluster1",
                        "cluster2",
                        "cluster3",
                    },
        Username: dbUsername,
        Password: dbPassword,

        DialServer: func(addr *mgo.ServerAddr) (net.Conn, error) {
            return tls.Dial("tcp", addr.String(), &tls.Config{})
        },
    })

    defer session.Close()
    c := session.DB("bd").C("col")
    err := c.Remove(bson.M{"c_id": sess.SessionId})
    if err != nil{
        panic(err)
    }
    cookie = &http.Cookie{
    Name: "session",
    Value: "",
    MaxAge: -1,
    }
    http.SetCookie(w,cookie)

    http.Redirect(w,req,"/", 302)
    return
}

Thank you