Set 'sessionid' cookie automatically.

client/index.html

@@ -11,6 +11,9 @@
 <script src="js/im.js" type="text/javascript"></script>
 <script type="text/javascript">
 $(function(){
+  if (!cookies.get('sessionid')) {
+    cookies.set('sessionid', uid(40));
+  }
   var u = window.location.href.split("/");
   var p = 8000; // Node.js port
   u = u[0]+"//"+u[2]+":"+p;

client/js/im.js

@@ -1473,3 +1473,11 @@ AjaxIM.debug = true;
 function _dbg(msg) {
     if(AjaxIM.debug && window.console) console.log(msg);
 }
+
+function uid(n){
+   var chars='abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789', nn='';
+   for(var c=0; c < n; c++){
+      nn += chars.substr(0|Math.random() * chars.length, 1);
+   }
+   return nn;
+}

server/dev/views/chat.jade

@@ -9,6 +9,7 @@ html(lang="en")
     script(src='/js/dateformat.js', type='text/javascript')
     script(src='/js/im.js', type='text/javascript')
     script(type='text/javascript').
-      $(function(){var im = AjaxIM.init({theme: "/themes/default"});});
+      $(function(){if (!cookies.get('sessionid')) cookies.set('sessionid', uid(40));
+      var im = AjaxIM.init({theme: "/themes/default"});});
   body.
     Hello.