The following code should check each input of type text and of type password and add a class to the input and it's label if the input has a value;

But it works only for inputs of type text, but not for inputs of type password!:

1.       function showAutoFillValue() {
2.         $('input[type=text], input[type=password]').each(function() {
3.           var input_value = $(this).val();
4.           if (input_value != '') {
5.             $(this).addClass('dirty').prev('label').addClass('dirty');
6.           }
7.         });
8.       }
9.       setTimeout(showAutoFillValue, 500);

Why is that?

Thanks