i'm trying to make a selective form field reset to initial values

this is achieved by copying all initial values into a new attribute

$('.billing input:text').each(function () { $(this).attr('original_value', $(this).attr('value')); });

and then restoring it as necessary with

$(this).attr('value', $(this).attr('original_value'));

this consistently fails in FF2/Win for form fields which had an empty string as their initial value and works for other fields

so to reproduce:

have two fields, one with value="foo", other with value=""

set both field contents to "bar", manually

run mentioned code

expected behaviour:

field1 reverts to "foo", field2 reverts to ""

found behaviour:

field1 reverts to "foo", field2 stays as "bar"

firebug shows both fields as reverted, but firefox does not update the displayed value for field2

workaround:

instead of .attr('value', '') use .removeAttr('value')

using .val() instead of .attr('value') makes no difference