Save button becomes Rename when the notebook name changes.

IPython/frontend/html/notebook/static/js/savewidget.js

@@ -26,11 +26,12 b' var IPython = (function (IPython) {'
 
     SaveWidget.prototype.style = function () {
         this.element.find('input#notebook_name').addClass('ui-widget ui-widget-content');
+        this.element.find('input#notebook_name').attr('tabindex','1');
         this.element.find('button#save_notebook').button();
         var left_panel_width = $('div#left_panel').outerWidth();
         var left_panel_splitter_width = $('div#left_panel_splitter').outerWidth();
         $('span#save_widget').css({marginLeft:left_panel_width+left_panel_splitter_width});
-        $('input#notebook_name').attr('tabindex','1');
+
     };
 
 
@@ -40,6 +41,9 b' var IPython = (function (IPython) {'
             IPython.notebook.save_notebook();
             that.set_document_title();
         });
+        this.element.find('input#notebook_name').change(function () {
+            that.status_rename();
+        });
     };
 
 
@@ -111,6 +115,13 b' var IPython = (function (IPython) {'
     };    
 
 
+    SaveWidget.prototype.status_rename = function () {
+        this.element.find('button#save_notebook').button('option', 'label', 'Rename');
+        this.element.find('button#save_notebook').button('enable');
+        IPython.print_widget.enable();
+    };
+
+
     IPython.SaveWidget = SaveWidget;
 
     return IPython;