diff --git a/UI/WebServerResources/MailerUI.js b/UI/WebServerResources/MailerUI.js
index 9604045a4..a86f3d554 100644
--- a/UI/WebServerResources/MailerUI.js
+++ b/UI/WebServerResources/MailerUI.js
@@ -179,15 +179,14 @@ function mailListMarkMessage(event) {
 }
 
 function mailListMarkMessageCallback(http) {
-  if (http.readyState == 4)
-    if (isHttpStatus204(http.status)) {
-      var data = http.callbackData;
-      markMailInWindow(data["window"], data["msguid"], data["markread"]);
-    }
-    else {
-      alert("Message Mark Failed (" + http.status + "): " + http.statusText);
-      window.location.reload();
-    }
+  if (isHttpStatus204(http.status)) {
+    var data = http.callbackData;
+    markMailInWindow(data["window"], data["msguid"], data["markread"]);
+  }
+  else {
+    alert("Message Mark Failed (" + http.status + "): " + http.statusText);
+    window.location.reload();
+  }
 }
 
 /* maillist row highlight */
@@ -235,31 +234,29 @@ function deleteSelectedMessages(sender) {
 }
 
 function deleteSelectedMessagesCallback(http) {
-  if (http.readyState == 4) {
-    if (isHttpStatus204(http.status)) {
-      var data = http.callbackData;
-      deleteCachedMessage(data["messageId"]);
-      deleteMessageRequestCount--;
-      if (Mailer.currentMailbox == data["mailbox"]) {
-	var div = $('messageContent');
-	if (Mailer.currentMessages[Mailer.currentMailbox] == data["id"]) {
-	  div.update();
-	  Mailer.currentMessages[Mailer.currentMailbox] = null;	
-	}
+  if (isHttpStatus204(http.status)) {
+    var data = http.callbackData;
+    deleteCachedMessage(data["messageId"]);
+    deleteMessageRequestCount--;
+    if (Mailer.currentMailbox == data["mailbox"]) {
+      var div = $('messageContent');
+      if (Mailer.currentMessages[Mailer.currentMailbox] == data["id"]) {
+	div.update();
+	Mailer.currentMessages[Mailer.currentMailbox] = null;	
+      }
 
-	var row = $("row_" + data["id"]);
-	var nextRow = row.next("tr");
-	if (!nextRow)
-	  nextRow = row.previous("tr");
-	row.parentNode.removeChild(row);
+      var row = $("row_" + data["id"]);
+      var nextRow = row.next("tr");
+      if (!nextRow)
+	nextRow = row.previous("tr");
+      row.parentNode.removeChild(row);
 //	row.addClassName("deleted"); // when we'll offer "mark as deleted"
       
-	if (deleteMessageRequestCount == 0) {
-	  if (nextRow) {
-	    Mailer.currentMessages[Mailer.currentMailbox] = nextRow.getAttribute("id").substr(4);
-	    nextRow.select();
-	    loadMessage(Mailer.currentMessages[Mailer.currentMailbox]);
-	  }
+      if (deleteMessageRequestCount == 0) {
+	if (nextRow) {
+	  Mailer.currentMessages[Mailer.currentMailbox] = nextRow.getAttribute("id").substr(4);
+	  nextRow.select();
+	  loadMessage(Mailer.currentMessages[Mailer.currentMailbox]);
 	}
       }
     }
@@ -488,8 +485,7 @@ function openMailbox(mailbox, reload, idx) {
 			   currentMessage);
 
     var quotasUrl = ApplicationBaseURL + mailbox + "/quotas";
-    document.quotasAjaxRequest
-      = triggerAjaxRequest(quotasUrl, quotasCallback);
+    triggerAjaxRequest(quotasUrl, quotasCallback);
   }
 }
 
@@ -503,8 +499,7 @@ function messageListCallback(http) {
   var div = $('mailboxContent');
   var table = $('messageList');
   
-  if (http.readyState == 4
-      && http.status == 200) {
+  if (http.status == 200) {
     document.messageListAjaxRequest = null;
 
     if (table) {
@@ -571,8 +566,7 @@ function messageListCallback(http) {
 }
 
 function quotasCallback(http) {
-  if (http.readyState == 4
-      && http.status == 200) {
+  if (http.status == 200) {
     var hasQuotas = false;
 
     if (http.responseText.length > 0) {
@@ -822,18 +816,16 @@ function onICalendarButtonClick(event) {
 }
 
 function ICalendarButtonCallback(http) {
-  if (http.readyState == 4)
-    if (isHttpStatus204(http.status)) {
-      var oldMsg = http.callbackData;
-      var msg = Mailer.currentMailbox + "/" + Mailer.currentMessages[Mailer.currentMailbox];
-      if (oldMsg == msg) {
-	deleteCachedMessage(oldMsg);
-	loadMessage(Mailer.currentMessages[Mailer.currentMailbox]);
-      }
-    }
-    else {
-      window.alert("received code: " + http.status);
+  if (isHttpStatus204(http.status)) {
+    var oldMsg = http.callbackData;
+    var msg = Mailer.currentMailbox + "/" + Mailer.currentMessages[Mailer.currentMailbox];
+    if (oldMsg == msg) {
+      deleteCachedMessage(oldMsg);
+      loadMessage(Mailer.currentMessages[Mailer.currentMailbox]);
     }
+  }
+  else
+    window.alert("received code: " + http.status);
 }
 
 function resizeMailContent() {
@@ -878,8 +870,7 @@ function onImageClick(event) {
 function messageCallback(http) {
   var div = $('messageContent');
 
-  if (http.readyState == 4
-      && http.status == 200) {
+  if (http.status == 200) {
     document.messageAjaxRequest = null;
     div.update(http.responseText);
     configureLinksInMessage();
@@ -1418,8 +1409,7 @@ function updateMailboxMenus() {
 }
 
 function onLoadMailboxesCallback(http) {
-  if (http.readyState == 4
-      && http.status == 200) {
+  if (http.status == 200) {
     checkAjaxRequestsState();
     if (http.responseText.length > 0) {
       var newAccount = buildMailboxes(http.callbackData,
@@ -1489,8 +1479,7 @@ function getFoldersState() {
 }
 
 function getFoldersStateCallback(http) {
-  if (http.readyState == 4
-      && http.status == 200) {
+  if (http.status == 200) {
     if (http.responseText.length > 0) {
       // The response text is a JSOn representation
       // of the folders that were left opened.
@@ -1501,8 +1490,8 @@ function getFoldersStateCallback(http) {
 	  mailboxTree.o(i);
       }
     }
+    mailboxTree.autoSync();
   }
-  mailboxTree.autoSync();
 }
 
 function saveFoldersState() {
@@ -1514,8 +1503,7 @@ function saveFoldersState() {
 }
 
 function saveFoldersStateCallback(http) {
-  if (http.readyState == 4
-      && isHttpStatus204(http.status)) {
+  if (isHttpStatus204(http.status)) {
     log ("folders state saved");
   }
 }
diff --git a/UI/WebServerResources/UIxAttendeesEditor.js b/UI/WebServerResources/UIxAttendeesEditor.js
index 21b4ae462..e7fe2a3a7 100644
--- a/UI/WebServerResources/UIxAttendeesEditor.js
+++ b/UI/WebServerResources/UIxAttendeesEditor.js
@@ -322,7 +322,8 @@ function displayFreeBusyForNode(input) {
       }
       var sd = $('startTime_date').valueAsShortDateString();
       var ed = $('endTime_date').valueAsShortDateString();
-      var urlstr = ( UserFolderURL + "../" + input.uid + "/freebusy.ifb/ajaxRead?"
+      var urlstr = ( UserFolderURL + "../" + input.uid
+		     + "/freebusy.ifb/ajaxRead?"
 		     + "sday=" + sd + "&eday=" + ed + "&additional=" +
 		     additionalDays );
       document.contactFreeBusyAjaxRequest
@@ -601,7 +602,8 @@ function prepareAttendees() {
 	 $(row).addClassName(attendeesEditor.states[i]);
 	 var input = $(row).down("input");
 	 var value = "";
-	 if (attendeesEditor.names[i].length > 0 && attendeesEditor.names[i] != attendeesEditor.emails[i])
+	 if (attendeesEditor.names[i].length > 0
+	     && attendeesEditor.names[i] != attendeesEditor.emails[i])
 	    value += attendeesEditor.names[i] + " ";
 	 value += "<" + attendeesEditor.emails[i] + ">";
 	 input.value = value;
diff --git a/UI/WebServerResources/generic.js b/UI/WebServerResources/generic.js
index 98b92030a..d25ea6670 100644
--- a/UI/WebServerResources/generic.js
+++ b/UI/WebServerResources/generic.js
@@ -309,39 +309,47 @@ function appendDifferentiator(url) {
   return url_nocache;
 }
 
+function onAjaxRequestStateChange(http) {
+  try {
+    if (http.readyState == 4
+	&& activeAjaxRequests > 0) {
+      if (!http.aborted)
+	http.callback(http);
+      activeAjaxRequests--;
+      checkAjaxRequestsState();
+      http.onreadystatechange = Prototype.emptyFunction;
+      http.callback = Prototype.emptyFunction;
+      http.callbackData = null;
+    }
+  }
+  catch (e) {
+    activeAjaxRequests--;
+    checkAjaxRequestsState();
+    http.onreadystatechange = Prototype.emptyFunction;
+    http.callback = Prototype.emptyFunction;
+    http.callbackData = null;
+    log("AJAX Request, Caught Exception: " + e.name);
+    log(e.message);
+    log(backtrace());
+  }
+}
+
 function triggerAjaxRequest(url, callback, userdata, content, headers) {
   var http = createHTTPClient();
 
-  activeAjaxRequests += 1;
-  document.animTimer = setTimeout("checkAjaxRequestsState();", 50);
+  activeAjaxRequests++;
+  document.animTimer = setTimeout("checkAjaxRequestsState();", 250);
   //url = appendDifferentiator(url);
 
   if (http) {
     http.open("POST", url, true);
     http.url = url;
-    http.onreadystatechange
-      = function() {
-//       log ("state changed (" + http.readyState + "): " + url);
-      try {
-	if (http.readyState == 4
-	    && activeAjaxRequests > 0) {
-	  if (!http.aborted) {
-	    if (userdata)
-	      http.callbackData = userdata;
-	    callback(http);
-	  }
-	  activeAjaxRequests -= 1;
-	  checkAjaxRequestsState();
-	}
-      }
-      catch (e) {
-	activeAjaxRequests -= 1;
-	checkAjaxRequestsState();
-	log("AJAX Request, Caught Exception: " + e.name);
-	log(e.message);
-	log(backtrace());
-      }
-    };
+    http.callback = callback;
+    http.callbackData = userdata;
+    http.onreadystatechange = function() { onAjaxRequestStateChange(http) };
+//       = function() {
+// //       log ("state changed (" + http.readyState + "): " + url);
+//     };
     var hasContentLength = false;
     if (headers) {
       for (var i in headers) {
@@ -367,36 +375,31 @@ function triggerAjaxRequest(url, callback, userdata, content, headers) {
 
 function startAnimation(parent, nextNode) {
   var anim = $("progressIndicator");
-  if (anim) return anim;
-  
-  anim = document.createElement("img");
-  anim = $(anim);
-  anim.id = "progressIndicator";
-  anim.src = ResourcesURL + "/busy.gif";
-  anim.setStyle({ visibility: "hidden" });
-  if (nextNode)
-    parent.insertBefore(anim, nextNode);
-  else
-    parent.appendChild(anim);
-  anim.setStyle({ visibility: "visible" });
+  if (!anim) {
+    anim = createElement("img", "progressIndicator", null,
+			 {src: ResourcesURL + "/busy.gif"});
+    anim.setStyle({ visibility: "hidden" });
+    if (nextNode)
+      parent.insertBefore(anim, nextNode);
+    else
+      parent.appendChild(anim);
+    anim.setStyle({ visibility: "visible" });
+  }
 
   return anim;
 }
 
 function checkAjaxRequestsState() {
-  var toolbar = document.getElementById("toolbar");
-  if (toolbar) {
-    if (activeAjaxRequests > 0
-        && !document.busyAnim) {
-      document.busyAnim = startAnimation(toolbar);
-    }
-    else if (activeAjaxRequests == 0
-	     && document.busyAnim
-	     && document.busyAnim.parentNode) {
-      document.busyAnim.parentNode.removeChild(document.busyAnim);
-      document.busyAnim = null;
-    }
+  var progressImage = $("progressIndicator");
+  if (activeAjaxRequests > 0
+      && !progressImage) {
+    var toolbar = $("toolbar");
+    if (toolbar)
+      startAnimation(toolbar);
   }
+  else if (!activeAjaxRequests
+	   && progressImage)
+    progressImage.parentNode.removeChild(progressImage);
 }
 
 function isSafari3() {