diff --git a/IPython/html/static/notebook/js/keyboardmanager.js b/IPython/html/static/notebook/js/keyboardmanager.js
index 0ccb705..fed12f6 100644
--- a/IPython/html/static/notebook/js/keyboardmanager.js
+++ b/IPython/html/static/notebook/js/keyboardmanager.js
@@ -100,23 +100,21 @@ var IPython = (function (IPython) {
help_index : '',
handler : function (event) {
var index = IPython.notebook.get_selected_index();
- if (index !== null && index !== 0) {
- var cell = IPython.notebook.get_cell(index);
- if (cell && cell.at_top()) {
- event.preventDefault();
- IPython.notebook.command_mode();
- IPython.notebook.select_prev();
- IPython.notebook.edit_mode();
- var cm = IPython.notebook.get_selected_cell().code_mirror;
- cm.setCursor(cm.lastLine(), 0);
- return false;
- } else if (cell) {
- var cm = cell.code_mirror;
- var cursor = cm.getCursor();
- cursor.line -= 1;
- cm.setCursor(cursor);
- return false;
- }
+ var cell = IPython.notebook.get_cell(index);
+ if (cell && cell.at_top() && index !== 0) {
+ event.preventDefault();
+ IPython.notebook.command_mode();
+ IPython.notebook.select_prev();
+ IPython.notebook.edit_mode();
+ var cm = IPython.notebook.get_selected_cell().code_mirror;
+ cm.setCursor(cm.lastLine(), 0);
+ return false;
+ } else if (cell) {
+ var cm = cell.code_mirror;
+ var cursor = cm.getCursor();
+ cursor.line -= 1;
+ cm.setCursor(cursor);
+ return false;
}
}
},
@@ -125,23 +123,21 @@ var IPython = (function (IPython) {
help_index : '',
handler : function (event) {
var index = IPython.notebook.get_selected_index();
- if (index !== null && index !== (IPython.notebook.ncells()-1)) {
- var cell = IPython.notebook.get_cell(index);
- if (cell && cell.at_bottom()) {
- event.preventDefault();
- IPython.notebook.command_mode();
- IPython.notebook.select_next();
- IPython.notebook.edit_mode();
- var cm = IPython.notebook.get_selected_cell().code_mirror;
- cm.setCursor(0, 0);
- return false;
- } else if (cell) {
- var cm = cell.code_mirror;
- var cursor = cm.getCursor();
- cursor.line += 1;
- cm.setCursor(cursor);
- return false;
- }
+ var cell = IPython.notebook.get_cell(index);
+ if (cell.at_bottom() && index !== (IPython.notebook.ncells()-1)) {
+ event.preventDefault();
+ IPython.notebook.command_mode();
+ IPython.notebook.select_next();
+ IPython.notebook.edit_mode();
+ var cm = IPython.notebook.get_selected_cell().code_mirror;
+ cm.setCursor(0, 0);
+ return false;
+ } else {
+ var cm = cell.code_mirror;
+ var cursor = cm.getCursor();
+ cursor.line += 1;
+ cm.setCursor(cursor);
+ return false;
}
}
},