Use keyboard as a mouse if mouse not worked

You can done everything by using mouse.But the mouse are not worked properly or mouse are not available.Then what to do?
in this situation you can use your keyboard as a mouse.it is very simple method and you can access your keyboard like a mouse.
To activate this just press

Alt+Left shift key+num lock
 
now you can access your keyboard as a mouse.

navigation keys for keyboard
5-select
2-move down
8-move up
4-move left
6-move right
for double click,just press the plus symbol(+)
for right click,just press the minus symbol (-)
to deactivate just press same key (i.e., Alt+Left shift key+num lock)
Thats all now you can use your keyboard as a mouse at any time.