I hope your password is not encoded in the javascript. And if the script tries it via asynchronous requests every time you type a character until you give the

I hope your password is not encoded in the javascript. And if the script tries it via asynchronous requests every time you type a character until you give the right password, think about the network overhead involved. And if you use this solution, how do you distinguish between a sloppy user (that recognizes (s)he hit a wrong key and immediately corrects it) and a bot trying to guess a password?