I'm fairly new to creating a website from scratch, but I have the webserver and the basics of the site already up. What I'm looking to do is add a chatbox for people browsing the site to talk to each other, and I don't even know where to begin to look for information, up to this point I've only learnt php and javascript where once the content is loaded, nothing can be changed, but I've seen plenty of examples of sites that have information that automatically updates as it is changed. Can anyone help me out, or point me in the right direction?