new window - can't read property

[Grzegorz ¦lusarek]

hello. I've code like this:

var x =window.open('h ttp://localhost/canvas.html','m yokno')
var w =x.width
Permission denied to get property Window.width
var w =x.innerWidth

Permission denied to get property Window.innerWid th
why i can get properties of new created window???
The second problem is much more important:
i want to get element which id is "canvas" and it is in new window so i do
like this:

var canvas = myokno.document .getElementById ('canvas')
ReferenceError: myokno is not defined
var canvas = x.document.getE lementById('can vas')
Permission denied to call method HTMLDocument.ge tElementById

so i start working on the problem and:
var can = x.document
can
[object HTMLDocument]
var can2 = can.getElementB yId('canvas')
Permission denied to call method HTMLDocument.ge tElementById

what i doing wrong?
Any help will be appreciated.

[Peroli]

Re: new window - can't read property

Hi Grzegorz Slusarek,

Grzegorz Slusarek wrote:[color=blue]
> hello. I've code like this:
>
> var x =window.open('h ttp://localhost/canvas.html','m yokno')
> var w =x.width
> Permission denied to get property Window.width[/color]
well, the popup window and the script which initiated it must be in the
same domain. (for eg). when you have a html file in "c:\sample.htm" ,
from which you popup "http://localhost/canvas.html", you cannot access
its properties. Its a security thing that browsers have implemented. So
copy the sample.htm to your localhost access it as
'http://localhost/sample.htm'.
[color=blue]
> var w =x.innerWidth
>
> Permission denied to get property Window.innerWid th
> why i can get properties of new created window???
> The second problem is much more important:
> i want to get element which id is "canvas" and it is in new window so i do
> like this:
>
> var canvas = myokno.document .getElementById ('canvas')
> ReferenceError: myokno is not defined[/color]
wrong.... use 'x' as you have done below.
[color=blue]
> var canvas = x.document.getE lementById('can vas')
> Permission denied to call method HTMLDocument.ge tElementById
>
> so i start working on the problem and:
> var can = x.document
> can
> [object HTMLDocument]
> var can2 = can.getElementB yId('canvas')
> Permission denied to call method HTMLDocument.ge tElementById
>
> what i doing wrong?
> Any help will be appreciated.[/color]

-- Peroli Sivaprakasam

[Gérard Talbot]

Re: new window - can't read property

Grzegorz ¦lusarek a écrit :[color=blue]
> hello. I've code like this:
>
> var x =window.open('h ttp://localhost/canvas.html','m yokno')
> var w =x.width
> Permission denied to get property Window.width
> var w =x.innerWidth
>
> Permission denied to get property Window.innerWid th
> why i can get properties of new created window???[/color]

Read the WindowObjectRef erence definition

http://developer.mozilla.org/en/docs/DOM:window.open#Return_value_and_parameters

and then the last question of the FAQ

http://developer.mozilla.org/en/docs/DOM:window.open#FAQ

[color=blue]
> The second problem is much more important:
> i want to get element which id is "canvas" and it is in new window so i do
> like this:
>
> var canvas = myokno.document .getElementById ('canvas')
> ReferenceError: myokno is not defined[/color]

When you created the window, the returned value was not stored in a
variable with the identifier "myokno": that's what the error message is
saying. Without being able to examine your code, it's impossible to
comment more.
[color=blue]
> var canvas = x.document.getE lementById('can vas')
> Permission denied to call method HTMLDocument.ge tElementById
>
> so i start working on the problem and:
> var can = x.document
> can
> [object HTMLDocument]
> var can2 = can.getElementB yId('canvas')
> Permission denied to call method HTMLDocument.ge tElementById
>
> what i doing wrong?
> Any help will be appreciated.[/color]

There are examples and best practices at this page:

http://developer.mozilla.org/en/docs/DOM:window.open

Basically, you are trying to modify (or set or get) properties or call
methods from one window to another which do not share the same domain
name: you can't do that... there are security reasons for this.

Gérard
--
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