focusManager.setFocus("Message");
Message.MessagehasFocus = false;
Key.addListener(usernameListener);

var usernameListener = new Object();
usernameListener.owner = this;
usernameListener.onKeyDown = function (){
if (this.owner.Message.MessagehasFocus && Key.isDown(Key.ENTER)){
this.owner.doSend();
Key.removeListener(usernameListener);
Key.addListener(usernameListener);
},
}