347973 - Form field value remembered after being modified onSubmit and then going back one page

Status: RESOLVED INVALID

(Core :: DOM: Navigation, defect)

Description

[Peter Newman]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.5) Gecko/20060731 Ubuntu/dapper-security Firefox/1.5.0.5
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.5) Gecko/20060731 Ubuntu/dapper-security Firefox/1.5.0.5

This behaviour is not be a bug but on first glance seems unexpected.  IE also has the same behaviour.  Everytime I hit submit and then go back and hit submit the same appended text is reappended.  Javascript:
    function validateOnSubmit() {
      var code = "_A";
      document.forms.js.subject.value = document.forms.js.subject.value + code;
      return true;
    };


Reproducible: Always

Steps to Reproduce:
1. submit
2. back
3. submit
4. back
5. submit
Actual Results:  
1. test_A
3. test_A_A
5. test_A_A_A

Expected Results:  
"test_A" every time

work around (or better programming style) is not to set the document.forms.FORM.FIELD.value from itself but best solution would be for the browser to return to state before onSubmit functions were executed!

Comment 1

[Marco Bonardo [:mak]]

you are appending and form values are remembered on going back (by design)... so imho this is invalid.

When you go back you want to find a form in the same status you leaved it