Caps Lock Status

Posted on 2006-11-02
Medium Priority
Last Modified: 2012-05-05
hi experts,

I m doing my asp.net project using javascript.  I have one login page. Now i what i want is, When the caps lock key is on that time the tooltip should get display. Question is how to trace whether the Caps Lock is on or off? Is there any way in javascript to trace this?

Plz Help. It's urgent.

Question by:s_monani
LVL 12

Accepted Solution

UnexplainedWays earned 672 total points
ID: 17857427
As far as i know there is no way to via javascript to find if the cap's lock is on, the only way i can think is to check when you get input if it's an upper or lower case.

So when something get's entered, check the data and get the ascii value of it.  If the letter is between a certain range then you can tell if it's upper or lower case, and if all the letters are upper they either have the shift key down or the cap's lock.

http://www.lookuptables.com for the numbers.

Assisted Solution

jsimbeck earned 664 total points
ID: 17857949
I've not tried this, but it may be worth a shot.  
(not my own work, I found it at:  http://www.rgagnon.com/pbdetails/pb-0236.html

[local function declaration]
FUNCTION  int GetKeyState(int keystatus) LIBRARY "user32.dll"

int li_keystate

li_keystate = GetKeyState(20)

IF li_keystate = 1 THEN
    MessageBox("", "CAPS on")
ELSEIF li_keystate = 0 THEN
    MessageBox("", "CAPS off")

Expert Comment

ID: 17860179
jsimbeck, that is not javascript and cannot be used for web development.

I will try to find something but, I would go with UnexplainedWays`s solution.
LVL 16

Assisted Solution

ellandrd earned 664 total points
ID: 17860234

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