fix upload button selection by class

superseed  #1676  #1658 (and correct bug in 1676 where one con't upload
notebook because of refresh)

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

@@ -1,82 +1,82 b''
 //----------------------------------------------------------------------------
 //  Copyright (C) 2008-2011  The IPython Development Team
 //
 //  Distributed under the terms of the BSD License.  The full license is in
 //  the file COPYING, distributed as part of this software.
 //----------------------------------------------------------------------------
 
 //============================================================================
 // On document ready
 //============================================================================
 
 
 $(document).ready(function () {
 
     IPython.page = new IPython.Page();
 
     $('div#tabs').tabs();
     $('div#tabs').on('tabsselect', function (event, ui) {
         var new_url = $('body').data('baseProjectUrl') + '#' + ui.panel.id;
         window.history.replaceState({}, '', new_url);
     });
     $('div#main_app').addClass('border-box-sizing ui-widget');
     $('div#notebooks_toolbar').addClass('ui-widget ui-helper-clearfix');    
     $('#new_notebook').button().click(function (e) {
         window.open($('body').data('baseProjectUrl')+'new');
     });
 
     IPython.read_only = $('body').data('readOnly') === 'True';
     IPython.notebook_list = new IPython.NotebookList('div#notebook_list');
     IPython.cluster_list = new IPython.ClusterList('div#cluster_list');
     IPython.login_widget = new IPython.LoginWidget('span#login_widget');
 
     var interval_id=0;
     // auto refresh every xx secondes, no need to be fast,
     //  update is done at least when page get focus
     var time_refresh = 60; // in sec
 
     var enable_autorefresh = function(){
         //refresh immediately , then start interval
-        if($('upload_button').length == 0)
+        if($('.upload_button').length == 0)
         {
             IPython.notebook_list.load_list();
             IPython.cluster_list.load_list();
         }
         if (!interval_id){
             interval_id = setInterval(function(){
-                    if($('upload_button').length == 0)
+                    if($('.upload_button').length == 0)
                     {
                         IPython.notebook_list.load_list();
                         IPython.cluster_list.load_list();
                     }
                 }, time_refresh*1000);
             }
     }
 
     var disable_autorefresh = function(){
         clearInterval(interval_id);
         interval_id = 0;
     }
 
     // stop autorefresh when page lose focus
     $(window).blur(function() {
         disable_autorefresh();
     })
 
     //re-enable when page get focus back
     $(window).focus(function() {
         enable_autorefresh();
     });
 
     // finally start it, it will refresh immediately
     enable_autorefresh();
 
     IPython.page.show();
     
     // bound the upload method to the on change of the file select list
     $("#alternate_upload").change(function (event){
         IPython.notebook_list.handelFilesUpload(event,'form');
     });
 
 });