I would like to create a site for the chatting. Users can join a chat group by openning a new window from a parent page. The new window uses applet for message sending. The parent page shows the number of online users. When a user joins a chatting group, the database is updated to add 1 to the onlineNum.
In the java file used for the applet, I need to fresh the parent page when a user join a group. How can I make it refresh when a user is added to the listbox of user? I have try the following code:
But it doesn't work. Please help me to fix it. Thanks.