Well I have this code here:

code:

---

// Create an object container to store the chat window object
var oChatWnds = {};

// Store the chat window object in our object container when it is opened
function OnEvent_ChatWndCreated(oChatWnd) {
    oChatWnds[oChatWnd.Handle] = {};
}

// Remove the variable from the object if the window is closed
function OnEvent_ChatWndDestroyed(oChatWnd) {
    delete oChatWnds[oChatWnd.Handle];
}

// If we send a message remove the chat window from the object container
function OnEvent_ChatWndSendMessage(oChatWnd, sMessage) {
    delete oChatWnds[oChatWnd.Handle];
}

// If we receive a message and the chat window exists in the object container
function OnEvent_ChatWndReceiveMessage(oChatWnd, sOrigin, sMessage, nMessageKind) {
    if (typeof oChatWnds[oChatWnd.Handle] === 'object') {
        // Send the message
        oChatWnd.SendMessage('hai');
        // Remove the chat window from the object container
        delete oChatWnds[oChatWnd.Handle];
    }
}

---

Javascript code:

---

// If we receive a message and the chat window exists in the object container
function OnEvent_ChatWndReceiveMessage(oChatWnd, sOrigin, sMessage, nMessageKind) {
    if (typeof oChatWnds[oChatWnd.Handle] === 'object') {
        // check which message was received
        switch (sMessage.toLowerCase()) {
            case "hai":
                oChatWnd.SendMessage('Hai');
                break;
            case "hello":
                oChatWnd.SendMessage('Hello');
                break;
            default: // anything else
                oChatWnd.SendMessage('Yo');
                break;
        }
        // Remove the chat window from the object container
        delete oChatWnds[oChatWnd.Handle];
    }
}

---

Works perfectly, thank you.