passing variables to iframes

Peter B

I have a program (which I cannot alter) which automatically creates a php page allowing me to insert iframes on it in specific places. I want to access a variable (hidden) on that page from my iframe which is a url. However the form from which I am trying to retrieve the variable has no name (below)

<form method="POST" action="something.php">
<input type="hidden" name="purchaseurl" value="https://www.url.com"&gt;
</form>


Is there some way I can use parent.document.purchaseurl.value or somehow find the value of the 'purchaseurl' variable so I can use this url in my form in the iframe.

Complicated?

bpmurray

Does window.parent.document.forms[0].purchaserurl work?

Peter B

Am currently trying

var t = window.parent.document.forms[0].purchaserurl.value

That failed so I then looked through the page and saw it was the second form so tried

var t = window.parent.document.forms[1].purchaserurl.value

Is there anyway I can look for the variable which is called purchaseurl in a form, not sure which one, on a parent page.

Also not sure if it makes a difference but the parent page's form is not submitted. So what I am trying to do is get a hidden value from a form which is not submitted. Is that possible?

egan007

You could try a javascript to print all the element names....
something like

for (var i=1; i<document.elements.length; i++) {
alert document.diy.elements.type
}

once you have the name you are in business

seamus

If the document in the iframe is not in the same domain as the parent document, you will probably get an "Access Denied" javascript error.

Peter B

Both documents are in the same domain. However I still cannot access the parent document. Just trying to access the title of the containing document.

Have tried loads of variations using parent and window.

eg alert(window.parent.document.title); -> does not work
alert(window.document.title); -> returns title of iframe page.
alert(parent.window.document.title); -> does not work

Any ideas?

Peter B

By the way, somehow managed to open the Java Console on Firefox and have many permission denied exceptions. Such as....


Error: uncaught exception: Permission denied to get property HTMLDocument.title

Why would permission be denied?

seamus

Do you have access to make changes to the main document?

A small workaround I've found is to add an element to the main document (I used an <input type="hidden"> element), give it an id and a value attribute. Then from the iframe, you can use parent.document.getElementById('doctitle').value to get the value of this element.

I also had some limited success with parent.document.getElementsByTagName('title') but I couldn't find out how to get the text between the <title> tags.