Code breaks IE scrollbars

[123Jim]

Hi all,
In my javscript testpage:
http://myweb.tiscali.co.uk/ladycroft/webdevfun/problem_solving.html

IE scrollbars don't drag with mouse pointer .. (works in other browsers)
IE tells me: "Object required" on Line 74, Char 3

This line:
while (fobj.tagName !== topelement && fobj.className !== "dragme")

What is the problem and how can I fix it?

 

[Tom de Neef]

Hi all,
In my javscript testpage:
http://myweb.tiscali.co.uk/ladycroft/webdevfun/problem_solving.html

IE scrollbars don't drag with mouse pointer .. (works in other browsers)
IE tells me: "Object required" on Line 74, Char 3

This line:
while (fobj.tagName !== topelement && fobj.className !== "dragme")

!== ???

Tom

 

[123Jim]

!== ???

I changed them back temporarily to != ,but I found the same error message
in IE for the same place in the code.

I also went back to the older code from here:
http://elouai.com/javascript-drag-and-drop.php which does not break IE
scrollbars on that page but the same code breaks IE scrollbars on my page
.... That page does not specify a doctype .. hmmm..... puzzling

 

[Gregor Kofler]

Am 2011-05-10 08:55, schrieb Tom de Neef:

!== ???

Why not?

Gregor

 

[Scott Sauyet]

In my javscript testpage:http://myweb.tiscali.co.uk/ladycroft/webdevfun/problem_solving.html

IE scrollbars don't drag with mouse pointer .. (works in other browsers)
IE tells me: "Object required" on Line 74, Char 3

|71| var fobj = nn6 ? e.target : event.srcElement;
|72| var topelement = nn6 ? "HTML" : "BODY";
|73|
|74| while (fobj.tagName !== topelement && fobj.className !==
"dragme")
|75| {
|76| fobj = nn6 ? fobj.parentNode : fobj.parentElement;
|77| }

On line 72, in IE, you set the top element to "BODY", but the object
you're working on (from the event.srcElement) is the HTML node.
You're never going to traverse up from there to the BODY.

-- Scott

 

[123Jim]

On line 72, in IE, you set the top element to "BODY", but the object
you're working on (from the event.srcElement) is the HTML node.
You're never going to traverse up from there to the BODY.

Many thanks, the code no longer breaks IE .. that gotta be good!
I changed this:
var topelement = nn6 ? "HTML" : "BODY";
to this:
var topelement = "HTML";

 

[Denis McMahon]

!== ???

Checks type and value.

Examples:

(0 == false) = true
(0 === false) = false // different types
(0 != false) = false
(0 !== false) = true // different types

Probably a moot point for object comparisons though, but very important
if a function returns returns false for failure and can return 0 as a
valid result.

Rgds

Denis McMahon

 

[Tom de Neef]

Checks type and value.

Examples:

(0 == false) = true
(0 === false) = false // different types
(0 != false) = false
(0 !== false) = true // different types

Probably a moot point for object comparisons though, but very important
if a function returns returns false for failure and can return 0 as a
valid result.

Thank you.
Tom