Secure Webscoket Connection using wss is never established

Question

i want to build an architecture with wss, i implement my certificates and they work. But now, when i'm connect on the browser, my program create websocket and close it directly, i don't understand why, this is my code which is running at port 5005

 window.onload=function(){
   if (!window.WebSocket) {
    window.WebSocket = window.MozWebSocket;
   }
  if (window.WebSocket) {

    socket = new WebSocket("wss://localhost:7575/websocket");

    socket.onopen = function(){
        alert("opened the connection");
        socket.send("Hello");
    };

    socket.onmessage = function(message){
        var json = jQuery.parseJSON(message.data);
        notifyApplication(json);
    };
    socket.onclose=function(){
     alert("Websocket coonection is closed");
    };
}
else {
    alert("Your browser doesn't support websocket");
}

};

and the webscoket server is implemented using netty and it is running at the port 7575. which offers an SSL3.0 enabled https connection.