40019 - JavaScript error in Mozilla and not in Netscape

Status: VERIFIED DUPLICATE of bug 4891

(Core :: DOM: HTML Parser, defect, P3)

Description

[Henrik Gemal]

if you go to:
http://search.support.microsoft.com/kb/c.asp
you'll get a

JavaScript error:
http://search.support.microsoft.com/kb/include/ENG/GN/C/cform.js line 103: docum
ent.forms[0] has no properties

you dont get this error in either IE or Netscape 4.73

Comment 1

[jay garcia]

What build ???? Please INCLUDE the build ID when submitting bug reports. This
worksforme in build 52020 - Win98SE and NT 4.0

Comment 2

[Henrik Gemal]

In build 2000052020.
The error is in the JavaScript console.

Comment 3

[Andreas Franke (gone)]

This javascript error message is also seen on PC/Linux, build 2000052109.

Comment 4

[Phil Schwartau]

Sorry for the delay - taking over QA for the JavaScript Engine group -
I am not able to access the js file in question: 

http://search.support.microsoft.com/kb/include/ENG/GN/C/cform.js

Without seeing the code, unfortunately there is no way to understand the bug.
It may not even be an issue purely of the JS Engine, but a DOM issue.

Is there a JS script that can reproduce this bug, and is accessible? 

Comment 5

[Henrik Gemal]

Attachment: cform.js file

Comment 6

[Phil Schwartau]

Henrik - thank you for attaching the cform.js file !!!

The HTML file of the given Web page calls functions in cform.js
It includes them via:

        <SCRIPT LANGUAGE="JavaScript" SRC="/kb/include/ENG/GN/C/cform.js">
        </SCRIPT>


The JavaScript error in cform.js is occurring on the line

        document.forms[0].LQ.value = strDefaultLQ ;

because JavaScript is not seeing "LQ" as a previously-defined 
property of document.forms[0].


If there were a static element in the HTML file, such as:

       <INPUT NAME='LQ' SIZE='49' TYPE='text'>

then document.forms[0].LQ would be defined, and the above line would not error.
However, the INPUT element is being created dynamically, by code in cform.js:

        document.write(htmlStr);

where htmlStr=     (etc. etc.) + 

       "<TD VALIGN='middle'><FONT FACE='Verdana,Arial,Helvetica' SIZE='2'>
        <B>My question is:</B></FONT><BR>" +  formGetLQ()    
  
                +  (etc. etc.)


The formGetLQ() function is back up in the HTML file:

       function formGetLQ() 
       {
        return "<INPUT NAME='LQ' SIZE='49' TYPE='text' 
        ONFOCUS='SetFocus()' MAXLENGTH='100'  VALUE='" + "" + "'>";
        }


Somehow we not resolving all of this completely - is this a Parser issue? 
Do not believe it is a problem purely of JS Engine...

Comment 7

[Phil Schwartau]

(Reassigned to Parser component)

Comment 8

[rickg]

Harish -- please take a look. This could be us, or just the JS engine. 

Comment 9

[Henrik Gemal]

Attachment: Very simple test case HTML file with a JS generated form

Comment 10

[Henrik Gemal]

Sorry for the spam.. Forget the last test case attacment. It's wrong. I'll 
investigate more...

Comment 11

[harishd]

CCing pollmann. Ref. bug 4891.

Comment 12

[Eric Pollmann]

Yup, this is bug 4891.  The fix in my tree makes the warning go away.  Marking 
this one a duplicate!

*** This bug has been marked as a duplicate of 4891 ***

Comment 13

[harishd]

Thanx Eric :)

Comment 14

[Azrael AOD]

Verifying as a duplicate of 4891
'document.forms[x] not defined if form is document.written out'