Beginning of a show chat history function

static/js/chat.js

@@ -28,6 +28,13 @@ var chat = (function()
         });
       });
     },
+    showHistory: function()
+    {
+      // this is a placeholder for the showHistory function
+      // load the messages from the server
+      // append them to the UI using addMessage
+      self.scrollDown(); // scroll down to the bottom of the chat
+    },
     hide: function () 
     {
       $("#chatcounter").text("0");