Javascript code:
var oChatWnds = {};
function OnEvent_ChatWndCreated(pChatWnd) {
oChatWnds[pChatWnd.Handle] = {};
oChatWnds[pChatWnd.Handle].pChatWnd = pChatWnd;
oChatWnds[pChatWnd.Handle].myVar = 'x';
}
function OnEvent_ChatWndDestroyed(pChatWnd) {
delete oChatWnds[pChatWnd.Handle];
}