function reset_cursor_values(line_id, index)

global handles vars

line_color = [ [1 0 0]; [0.7 0 1]; [1 1 0]; [0 1 0]; [0 1 1] ];
line_color = (1 - line_color)/2 + line_color;

if line_id <= 2
    axes(handles.mainplot);
    userdata = get(handles.mainplot,'userdata');
    line_data = userdata.lines(line_id);
    line_type = line_id;
    if line_id == 1
        label = 'mV';
	cursorlabel = 'Memb. Voltage';
    else
        label = 'nA';
	cursorlabel = 'Stimulus';
    end
else
    axes(handles.varplot);
    userdata = get(handles.varplot,'userdata');
    line_data = userdata.lines(line_id - 2);
    button_handle = str_eval(['handles.v' int2str(line_id-2) 'button']);
    popupval = get(button_handle,'Value');
    line_type_array = [3 3 3 4 4 5 5 6 3 3 4 5 1];
    line_type = line_type_array(popupval);
    label_array = ['  ';'  ';'  ';'uA';'uA';'uS';'uS';'uA';'  ';'  ';'uA';'pS';'  '];
    label = label_array(popupval,1:2);
    popupstrings = get(button_handle,'String');
    cursorlabel = popupstrings{popupval};
end

xdata = get(line_data, 'Xdata');
ydata = get(line_data, 'Ydata');

y_graph_val = ydata(index);
y_val = graph_scale(y_graph_val, line_type, 0);

% if there is no value on that line
if isnan(y_graph_val)
    line_id = mod(line_id, 5) + 1;
    reset_cursor_values(line_id, index);
    return;
end

% setting the cursor size
xlim = get(gca, 'Xlim');         ylim = get(gca, 'Ylim');
c_xsize = 0.01 * (xlim(2) - xlim(1));
c_ysize = 0.06 * (ylim(2) - ylim(1));
if (line_id > 2)
    c_ysize = c_ysize * 2;
end

if line_id <= 2
  set(handles.cursor, ...
  'Position', [xdata(index)-c_xsize/2, y_graph_val-c_ysize/2, c_xsize, c_ysize], ...
      'Curvature', [1 1], ...
      'FaceColor', line_color(line_id,1:3), 'visible', 'on', 'parent', handles.mainplot);
else
  set(handles.cursor, ...
  'Position',[xdata(index)-c_xsize/2, y_graph_val-c_ysize/2, c_xsize, c_ysize], ...
      'Curvature', [1 1], ...
      'FaceColor', line_color(line_id,1:3), 'visible', 'on', 'parent', handles.varplot);
end

set(handles.cursor_text, 'String', [sprintf('%5.3g',y_val) ' ' label], ...
    'backgroundcolor',line_color(line_id,:));
set(handles.cursor_time_text, 'String', [sprintf('%5.2f',xdata(index)) ' msec']);
set(handles.cursor_label_text, ...
    'ForegroundColor',line_color(line_id,:),'String',cursorlabel)

userdata = get(handles.cursor, 'UserData');
userdata.index = index;
userdata.xval = xdata(index);
userdata.line_id = line_id;
userdata.yval=y_val;
set(handles.cursor, 'UserData', userdata);

vars.cursorx=index;

% hide the cursor if it goes off the screen
if ( (xdata(index) < xlim(1)) | (xdata(index) > xlim(2)) )
  set_cursor_vis('off');
end