got self-hosted website working.

ui/js/arena.js

@@ -1,5 +1,5 @@
 $(document).ready(function(){
-    $('#starter,#watch').prop('disabled', 'disabled');
+    $('#starter').prop('disabled', 'disabled');
     $("#error").hide();
     editor = ace.edit("editor");
     editor.setTheme("ace/theme/monokai");
@@ -26,21 +26,13 @@ $(document).ready(function(){
 
     $('#starter').click(function() {
         $('#tabs a[href="#arena"]').tab('show');
-        var url = "ws://{{ server.hostname }}:8666/ws/";
         gorobots.set_spectator(false);
-        gorobots.set_server(
-                url,
-                "{{ game }}"
-                );
+        gorobots.set_server(wsurl(), getGameID());
     });
     $('#watch').click(function() {
         $('#tabs a[href="#arena"]').tab('show');
-        var url = "ws://{{ server.hostname }}:8666/ws/";
         gorobots.set_spectator(true);
-        gorobots.set_server(
-                url,
-                "{{ game }}"
-                );
+        gorobots.set_server(wsurl(), getGameID());
     });
 
     $('#tabs a[href="#code"]').tab('show');
@@ -60,7 +52,7 @@ function loadCode() {
         editor.setValue(e);
         $("#editor").show();
         $("#fetch-area").hide();
-        $('#starter,#watch').prop('disabled', function(i, v) { return !v; });
+        $('#starter').prop('disabled', '');
     }).fail(function(e){
         var msg = "got a useless error message; is the remote server down?";
         if (e.statusText != "error") {
@@ -69,3 +61,11 @@ function loadCode() {
         $("#error").text(msg).show();
     });
 }
+
+function wsurl() {
+    return "ws://" + window.location.host + "/ws/";
+}
+
+function getGameID() {
+    return window.location.search.split("=")[1];
+}