How to Get Password Behind the Asterisk

Guys,
Now I am Gonna Show You How to Get Password Behind the Asterisk, that is *******.(This is Mostly Work on Internet Explorer May be on Others Also)

So, Lets Start.....
1) Goto Any Login Page, 2)Now U have Enter User-Id and password
Now You Have Password But you cant read..
So Follow the Important Step..Erase Your Whole Address bar (i.e, http://.....)
And Enter Following Java Script- Code.javascript: alert(document.getElementById('Passwd').value);
Now Press ENTER..... or Click on Go...You will Get Error.... But that error is Your Password... TADDAAAA