Closed Bug 282428 Opened 20 years ago Closed 20 years ago

When a DOCTYPE used external DHTML Javascript menu isn't displayed

Categories

(Core :: Layout, defect)

Product:
Core
Component:
Layout
Platform:
x86
Windows XP
Type:
defect
Priority:
Not set
Severity:
major

Tracking

()

Status:
RESOLVED INVALID

People

(Reporter: chowell, Unassigned)

References

(
URL
)

Details

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0

Firefox 1.0 does not process external DHTML javascript file when <!DOCTYPE HTML
PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html40/strict.dtd"> or
Transitional DOCTYPE included in the document.
see http://www.pcug.org.au/~chowell/ which works in MSIE and not in Firefox 1.0
When I remove the DOCTYPE statement from the page it all works but then it
breaks my Validated HTML.
http://validator.w3.org/check?uri=http://www.pcug.org.au/~chowell/index.htm


Reproducible: Always

Steps to Reproduce:
1. Open http://www.pcug.org.au/~chowell/ in Firefox 1.0
2. Open http://www.pcug.org.au/~chowell/ in MSIE
3. See the different in the DHTML dropdown menu on the top left of page

Actual Results:  
There is no menu in Firefox but is in MSIE.
If I remove the DOCTYPE declaration at the start of the page then Firefox
displays the menu and it works.

Expected Results:  
I expected that it would use the DOCTYPE correctly as validated by W3C
Your 
http://www.pcug.org.au/~chowell/header.js
script has the instruction 
document.write("<SCRIPT TYPE=\"text/javascript\">Go();</SCRIPT>");

Warning: redeclaration of function Go
Source File: http://www.pcug.org.au/~chowell/fw_menu.js
Line: 164, Column: 9
Source Code:
function Go(){

line 1: function Go(){return}

line 164: function Go(){
	Dummy();
	if(Loadd||!PosStrt)return;

Just set Edit/Preferences.../Debug/Show strict javascript warning to see more.

[on a side note; I wonder why you need to dynamically write the <script> to call
the Go function.]
> Just set Edit/Preferences.../Debug/Show strict javascript warning to see more.
or in about:config, set the property
javascript.options.strict
to true.
I have cleaned up the javascript after going through the console and checking it
all. There are now no errors, warning or messages generated by the page. The
problem remains. When I specify a DOCTYPE - the menu is not displayed, when I
don't specify DOCTYPE it is displayed. I have added another page
http://www.pcug.org.au/~chowell/nodoctype.htm which has the DOCTYPE line removed
otherwise it is the same as http://www.pcug.org.au/~chowell/index.htm 
"The CSS error handling rules require erroneous parts to be ignored rather than
fixed by guessing.
    * Lengths other than zero should be followed by a proper unit without a
space between the number and the unit (eg. 1.2em). (...)
    * In Mozilla 1.8a4 and later (not in Firefox 1.0) CSS parsing errors are
reported to the JavaScript console."
http://www.mozilla.org/docs/web-developer/faq.html#stylenotworking

No error report on
http://www.pcug.org.au/~chowell/cha.css
but the javascript console reports numerous errors for inline style. E.g.:
Error: Error in parsing value for property 'background-color'.  Declaration dropped.
Source File: http://www.pcug.org.au/~chowell/index.htm
Line: 0
Error: Error in parsing value for property 'width'.  Declaration dropped.
Source File: http://www.pcug.org.au/~chowell/index.htm
Line: 0
Error: Error in parsing value for property 'top'.  Declaration dropped.
Source File: http://www.pcug.org.au/~chowell/index.htm
Line: 0
Error: Error in parsing value for property 'left'.  Declaration dropped.
Source File: http://www.pcug.org.au/~chowell/index.htm
Line: 0
etc..
Line 0 is because of the loaded script functions.

Everywhere in the js file fw_menu.js the functions assign values to css
properties _withOUT units_, then you get an error in parsing value for property
message because there is no unit. This is why the javascript console reports css
parsing errors) regarding the code around assignment instructions like:
var BorderWidth=1;    // Border width
which must be, should be rather
var BorderWidth = "1px";
if you want browsers in web standards compliant mode (like MSIE 6, Opera 7+,
Mozilla) to render such border. This is already explained at both
http://www.mozilla.org/docs/web-developer/upgrade_2.html#dom_manip
and
http://www.mozilla.org/docs/web-developer/faq.html#stylenotworking
and also at MSDN for MSIE 6.
Note the paragraph and links to W3C parsing errors correction: "CSS1 and CSS 2.x
specifications require that non-zero values must be specified with a length
unit; otherwise, the css declaration will be ignored. Mozilla-based browsers,
MSIE 6, Opera 7+ and other W3C standards-compliant browsers enforce such
handling of parsing error.
CSS1 Forward-compatible parsing
CSS2.1 Rules for handling parsing errors"

"properties are ignored when the !DOCTYPE declaration switches on
standards-compliant mode. The first property is ignored because there is no unit
type identifier present."
CSS Enhancements in Internet Explorer 6
Stricter Style Sheet Parsing
Missing Unit Type Identifiers Treated as Pixel Values
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnie60/html/IE60_ta_landing.asp


Also in the fw_menu.js functions:
var FontSize=10;
strictly speaking, this could be 10px, 10ex, 10mm; that's why specifying
explicitly the unit is not only required by CSS conforming agents but even for
an human, in the absolute, 10 refers to nothing exactly, to nothin per se.

var StartLeft=10;    // Menu offset y coordinate
var StartTop=50;    // Menu offset x coordinate
var TopPaddng=2;    // Top padding

Resolving as INVALID
Status: UNCONFIRMED → RESOLVED
Closed: 20 years ago
Resolution: --- → INVALID
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