add: case "cmd_delete": case "cmd_shiftdelete": 
context:     isCommandEnabled: function(command)    {        var enabled = true;                switch (command) {           case "goto_folder_button":            if (GetNumSelectedMessages() != 1)              enabled = false;            break;          case "button_delete":            // this assumes that advanced searches don't cross accounts            if (GetNumSelectedMessages() <= 0 || isNewsURI(gSearchView.getURIForViewIndex(0)))              enabled = false;            break;          default:            if (GetNumSelectedMessages() <= 0)              enabled = false;            break;        }        return enabled;    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/9f9fbfa333ce4ce7fa50ed42e5d8fb44ab0e42a1/SearchDialog.js/clean/mailnews/base/search/resources/content/SearchDialog.js