Newbie question: how to communicate to webpage through IFrame - javascript? - Iframe Module [Lead: Vitaly Kozadayev]

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8/29/2006 11:35 AM

	Johannes Dolberg
19 posts

Newbie question: how to communicate to webpage through IFrame - javascript?

Hi,
I've just completed a google maps DNN module that loads fine in firefox... but wont show in IE. I thought that I could solve this by putting the google maps html part on a seperate html page and accessing this through an IFrame.
I did this and the maps shows just OK but I cant get to call any of the javascript functions on the html page.

I'm new to Iframes (both the DNN module and the "real" ones). I figure I'll just set the google maps aside for a while and just get a hello world example done that shows how to communicate through the Iframe.

My question to you all is: How would you go around firing a "hello world" alert placed inside the Iframe html page from the outside (at the DNN module level). I've tried getting hold of the contentDocument by doing

document.getElementById("mapIFrame").contentdocument

but I cant access any of the javascript functions placed in the document.
I can't figure out why this is so, so I hope to get some ideas from all you guys

Best Regards,
Johannes

9/7/2006 3:07 AM

	Axel Scheiwe
1 posts
www.crm.de

Re: Newbie question: how to communicate to webpage through IFrame - javascript?

You cannot access the content of the frame via the document you are in.

You need to get the frame content itself, usually done with

parent.frames[0].document

9/7/2006 5:05 PM

	Johannes Dolberg
19 posts

Re: Newbie question: how to communicate to webpage through IFrame - javascript?

Hi,
thanks very much for the answer.
I tried this: parent.frames[0].document.helloWorld();
I get this in my javascript console:
parent.frames[0].document.helloWorld is not a function, so I'm still puzzled about this.

parent.frames[0].document.write("hello"); does give me the words "hello" written inside the Iframe.
Is it at all possible to call javascript functions embedded in Iframes?
Best Regards,
Johannes

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