diff --git a/source/Ox.UI/Ox.UI.js b/source/Ox.UI/Ox.UI.js
index 20ee3809..c5c7ba1d 100644
--- a/source/Ox.UI/Ox.UI.js
+++ b/source/Ox.UI/Ox.UI.js
@@ -354,6 +354,13 @@ Ox.load.UI = function(options, callback) {
             });
         };
         Ox.UI.IMAGE_CACHE = [];
+        /*@
+        Ox.UI.isElement <f> check if object is an Ox.Element
+            (obj) -> <b>  true if object is an Ox.Element
+        @*/
+        Ox.UI.isElement = function(obj) {
+            return Ox.isObject(obj) && 'oxid' in obj;
+        };
         Ox.UI.PATH = Ox.PATH + 'Ox.UI/';
         Ox.UI.SCROLLBAR_SIZE = $.browser.mozilla ? 16 : 12;
         // fixme: the follwing should be deprecated
diff --git a/source/Ox.UI/js/Core/Ox.Element.js b/source/Ox.UI/js/Core/Ox.Element.js
index 793e6764..cb41e786 100644
--- a/source/Ox.UI/js/Core/Ox.Element.js
+++ b/source/Ox.UI/js/Core/Ox.Element.js
@@ -324,7 +324,7 @@ Ox.Element = function(options, self) {
         () -> <o> object
     @*/
     that.bindKeyboard = function() {
-        Ox.Keyboard.bind(that.id);
+        Ox.Keyboard.bind(that.oxid);
         return that;
     };
 
@@ -353,7 +353,7 @@ Ox.Element = function(options, self) {
     () -> <obj> This element object
     @*/
     that.gainFocus = function() {
-        Ox.Focus.focus(that.id);
+        Ox.Focus.focus(that.oxid);
         return that;
     };
 
@@ -362,7 +362,7 @@ Ox.Element = function(options, self) {
     () -> <boolean> True if the element has focus
     @*/
     that.hasFocus = function() {
-        return Ox.Focus.focused() == that.id;
+        return Ox.Focus.focused() == that.oxid;
     };
 
     /*@
@@ -370,7 +370,7 @@ Ox.Element = function(options, self) {
     () -> <object> This element object
     @*/
     that.loseFocus = function() {
-        Ox.Focus.blur(that.id);
+        Ox.Focus.blur(that.oxid);
         return that;
     };
 
@@ -403,10 +403,10 @@ Ox.Element = function(options, self) {
                 element = Ox.UI.elements[oxid];
             element && element.remove(false);
         });
-        Ox.Focus.remove(that.id);
-        Ox.Keyboard.unbind(that.id);
+        Ox.Focus.remove(that.oxid);
+        Ox.Keyboard.unbind(that.oxid);
         delete self.$eventHandler;
-        delete Ox.UI.elements[that.id];
+        delete Ox.UI.elements[that.oxid];
         that.$tooltip && that.$tooltip.remove();
         remove !== false && that.$element.remove();
         return that;
@@ -417,8 +417,7 @@ Ox.Element = function(options, self) {
         ($element) -> null
     @*/
     that.setElement = function($element) {
-        //$element[0].className = that.$element[0].className;
-        $element.addClass('OxElement').data({oxid: that.id});
+        $element.addClass('OxElement').data({oxid: that.oxid});
         that.$element.replaceWith($element);
         that.$element = $element;
         that[0] = that.$element[0];
@@ -453,7 +452,7 @@ Ox.Element = function(options, self) {
                 'playing', 'position', 'progress', 'request'
             ].indexOf(event) == -1) {
                 if (!/^pandora_/.test(event)) {
-                    Ox.Log('EVENT', that.id, self.options.id, 'trigger', event, data);
+                    Ox.Log('EVENT', that.oxid, self.options.id, 'trigger', event, data);
                 }
             }
             // it is necessary to check if self.$eventHandler exists,
@@ -495,7 +494,7 @@ Ox.Element = function(options, self) {
         () -> <o> object
     @*/
     that.unbindKeyboard = function() {
-        Ox.Keyboard.unbind(that.id);
+        Ox.Keyboard.unbind(that.oxid);
         return that;
     };
 
diff --git a/source/Ox.UI/js/Core/Ox.JQueryElement.js b/source/Ox.UI/js/Core/Ox.JQueryElement.js
index f6fce959..cac0ccbe 100644
--- a/source/Ox.UI/js/Core/Ox.JQueryElement.js
+++ b/source/Ox.UI/js/Core/Ox.JQueryElement.js
@@ -8,43 +8,30 @@ Ox.JQueryElement <f> Wrapper for jQuery
 Ox.JQueryElement = function($element) {
     var that = this;
     //@ id <number> Unique id
-    that.id = Ox.uid(); // fixme: rename to oxid!
-    //@ ox <string> OxJS version
-    that.ox = Ox.VERSION; // fixme: remove!
+    that.oxid = Ox.uid();
     //@ $element <object> The jQuery-wrapped DOM element
     that.$element = $element.data({
-        oxid: that.id
+        oxid: that.oxid
     });
-    // FIXME: the following two lines should make it possible to do
-    // $('<div>').appendTo($element) ... check if it works, then replace all
     //@ 0 <element> The DOM element
     that[0] = that.$element[0];
     //@ length <number> 1 (for compatibility with jQuery)
     that.length = 1;
-    Ox.UI.elements[that.id] = that;
+    Ox.UI.elements[that.oxid] = that;
     return that;
 };
 
 // add all jQuery functions to the prototype of Ox.JQueryElement
 Ox.methods($('<div>'), true).forEach(function(method) {
     Ox.JQueryElement.prototype[method] = function() {
-        var args = arguments, id, ret, that = this;
-        Ox.forEach(args, function(arg, i) {
-            // FIXME: with the changes above, is this still needed?
-            // if an ox object was passed
-            // then pass its $element instead
-            // so that we can do oxObj.jqFn(oxObj)
-            if (arg && arg.ox) {
-                args[i] = arg.$element;
-            }
-        });
+        var args = arguments, oxid, ret, that = this;
         ret = that.$element[method].apply(that.$element, args);
         // if exactly one $element of an ox object was returned
         // then return the ox object instead
         // so that we can do oxObj.jqFn().oxFn()
         return ret && ret.jquery
             && ret.length == 1
-            && Ox.UI.elements[id = ret.data('oxid')]
-            ? Ox.UI.elements[id] : ret;
+            && Ox.UI.elements[oxid = ret.data('oxid')]
+            ? Ox.UI.elements[oxid] : ret;
     };
 });
diff --git a/source/Ox.UI/js/Form/Ox.Input.js b/source/Ox.UI/js/Form/Ox.Input.js
index 17fd6c13..5132908c 100644
--- a/source/Ox.UI/js/Form/Ox.Input.js
+++ b/source/Ox.UI/js/Form/Ox.Input.js
@@ -722,7 +722,7 @@ Ox.Input = function(options, self) {
         var input = self.$input[0];
         that.triggerEvent('insert', {
             end: input.selectionEnd,
-            id: that.id,
+            id: that.oxid,
             selection: input.value.substring(input.selectionStart, input.selectionEnd),
             start: input.selectionStart,
             value: input.value
diff --git a/source/Ox.UI/js/List/Ox.List.js b/source/Ox.UI/js/List/Ox.List.js
index 16a63bd5..54885f11 100644
--- a/source/Ox.UI/js/List/Ox.List.js
+++ b/source/Ox.UI/js/List/Ox.List.js
@@ -783,7 +783,7 @@ Ox.List = function(options, self) {
             !Ox.isUndefined(callback) && callback();
             return;
         }
-        Ox.Log('List', that.id, 'loadPage', page);
+        Ox.Log('List', that.oxid, 'loadPage', page);
         var keys = Ox.merge(
                 self.options.keys.indexOf(self.options.unique) == -1
                 ? [self.options.unique] : [], self.options.keys
diff --git a/source/Ox.UI/js/Window/Ox.Dialog.js b/source/Ox.UI/js/Window/Ox.Dialog.js
index bc90262d..e650d154 100644
--- a/source/Ox.UI/js/Window/Ox.Dialog.js
+++ b/source/Ox.UI/js/Window/Ox.Dialog.js
@@ -518,7 +518,7 @@ Ox.Dialog = function(options, self) {
 
     function setContent() {
         var animate = !!self.$content,
-            isImage = !self.options.content.ox && self.options.content.is('img');
+            isImage = !Ox.UI.isElement(self.options.content) && self.options.content.is('img');
         if (animate) {
             self.$content.animate({
                 opacity: 0