Detecting Browser Autofill

Question

How do you tell if a browser has auto filled a text-box? Especially with username & password boxes that autofill around page load.

My first question is when does

Answer 1

I used this solution for same problem.

HTML code should change to this:

and jQuery code should be in document.ready:

$('#txt_password').focus(function(){
    $(this).attr('type','password');
});