Index: branches/5.2.x/core/admin_templates/tree.tpl
===================================================================
diff -u -N -r15905 -r16293
--- branches/5.2.x/core/admin_templates/tree.tpl	(.../tree.tpl)	(revision 15905)
+++ branches/5.2.x/core/admin_templates/tree.tpl	(.../tree.tpl)	(revision 16293)
@@ -13,15 +13,18 @@
 	}
 
 	function onTreeFrameResize() {
-		var $frameset = $('#sub_frameset', window.parent.document);
-		if (!$frameset.length) {
-			return ;
+		var $menu_frame = $('#menu_frame', window.parent.document),
+            $width;
+
+		if (!$menu_frame.length) {
+			return;
 		}
 
-		var $width = $frameset.attr('cols').split(',')[0];
-		if (($width <= 0) || ($width == $last_width)) {
+		$width = $menu_frame.width();
+
+        if (($width <= 0) || ($width == $last_width)) {
 			// don't save zero width
-			return ;
+			return;
 		}
 
 		clearTimeout($save_timer);
@@ -193,4 +196,4 @@
 
 <!--## when form is on top, then 100% height is broken ##-->
 <inp2:m_RenderElement name="kernel_form"/>
-<inp2:m_include t="incs/footer"/>
\ No newline at end of file
+<inp2:m_include t="incs/footer"/>
Index: branches/5.2.x/core/admin_templates/index.tpl
===================================================================
diff -u -N -r15445 -r16293
--- branches/5.2.x/core/admin_templates/index.tpl	(.../index.tpl)	(revision 15445)
+++ branches/5.2.x/core/admin_templates/index.tpl	(.../index.tpl)	(revision 16293)
@@ -40,7 +40,7 @@
 	<inp2:m_if check="m_GetConfig" name="ResizableFrames">
 		<frame src="<inp2:m_t t='head' pass='m' m_cat_id='0' m_opener='s' no_pass_through='1'/>" name="head" id="head_frame" scrolling="no" noresize frameborder="0" border="0">
 		 	<frameset id="sub_frameset" cols="<inp2:m_if check='m_RecallEquals' name='ShowAdminMenu' value='0' persistent='1'><inp2:adm_MenuFrameWidth/><inp2:m_else/>0</inp2:m_if>,*" border="1">
-				<frame src="<inp2:m_t t='tree' pass='m' m_cat_id='0' m_opener='s' no_pass_through='1'/>" name="menu" target="main" scrolling="auto" marginwidth="0" marginheight="0" border="1" frameborder="1">
+				<frame src="<inp2:m_t t='tree' pass='m' m_cat_id='0' m_opener='s' no_pass_through='1'/>" id="menu_frame" name="menu" target="main" scrolling="auto" marginwidth="0" marginheight="0" border="1" frameborder="1">
 				<inp2:m_DefineElement name="root_node">
 					<frame src="<inp2:m_if check='adm_MainFrameLink'><inp2:adm_MainFrameLink/><inp2:m_else/><inp2:m_param name='section_url'/></inp2:m_if>" name="main" marginwidth="0" marginheight="0" scrolling="auto" border="1" frameborder="1">
 				</inp2:m_DefineElement>
@@ -50,7 +50,7 @@
 	<inp2:m_else/>
 		<frame src="<inp2:m_t t='head' pass='m' m_cat_id='0' m_opener='s' no_pass_through='1'/>" name="head" scrolling="no" noresize="noresize">
 		 	<frameset id="sub_frameset" cols="<inp2:m_if check='m_RecallEquals' name='ShowAdminMenu' value='0' persistent='1'><inp2:adm_MenuFrameWidth/><inp2:m_else/>0</inp2:m_if>,*" border="0">
-				<frame src="<inp2:m_t t='tree' pass='m' m_cat_id='0' m_opener='s' no_pass_through='1'/>" name="menu" target="main" noresize scrolling="auto" marginwidth="0" marginheight="0">
+				<frame src="<inp2:m_t t='tree' pass='m' m_cat_id='0' m_opener='s' no_pass_through='1'/>" id="menu_frame" name="menu" target="main" noresize scrolling="auto" marginwidth="0" marginheight="0">
 				<inp2:m_DefineElement name="root_node">
 					<frame src="<inp2:m_if check='adm_MainFrameLink'><inp2:adm_MainFrameLink/><inp2:m_else/><inp2:m_param name='section_url'/></inp2:m_if>" name="main" marginwidth="0" marginheight="0" frameborder="no" noresize scrolling="auto">
 				</inp2:m_DefineElement>
@@ -63,4 +63,4 @@
 			<p></p>
 		</body>
 	</noframes>
-</html>
\ No newline at end of file
+</html>