I cannot call the same iframe twice

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christophe200

Hi all
I have an iframe dynamically created that I can access without any
problem using: window.frames['frameName'].document.

Now, if I call this command, remove the iframe from the DOM and
recreate it (with the same name), the same command window.frames
['frameName'].document returns null (though, the iframe exists in the
DOM, the name used to access it is correct... ).

I suspect the iframe (or window.frames['frameName']) is not
completely cleared when I remove it from the DOM as if I run
window.frames['frameName'].document before it has ever been created,
firebug returns a type error (TypeError: window.frames['frameName'] is
undefined). However, the same command returns null (without error)
after creation, deletion and creation again of the same iframe.

is there something I need to do when the iFrame is being removed to
completely clear the memory - I really don't get what is happening -
but I am a beginner in JavaScript.

Thanks in advance for any type of hint.
Cheers
Christophe (using FF 3.0.8)

Fang

Can you show the code you use for creation and deletion?

christophe200

I develop using Ext framework and my iframes are embedded in a window components (for an example, you can open a window from http://extjs.com/deploy/dev/examples/desktop/desktop.html)

the close function for the window looks like:

close : function(){
if(this.fireEvent("beforeclose", this) !== false){
this.hide(null, function(){
this.fireEvent('close', this);
this.destroy();
}, this);
}

and the doc says that this
"Closes the window, removes it from the DOM and destroys the window object".

Now, I had a closer look using frame index instead of names, and I do not get the same problem (i.e. window.frames[0] works fine when if I open an iframe, close it and open it again). But I need to refer to the iframe using the names attribute, no luck.

Cheers and thanks for the reply
Christophe

Fang

What does window.frames[0].name give?

christophe200

well, it gives the correct name of the iframe (after create, remove, recreate, ...) Can't see anything unusual there.
C.

christophe200

Thanks for your help fang.
It seems that "delete window.frames[frameName];" after closing the window does the trick.
C.