“Access is denied” error on accessing iframe document object

Question

For posting AJAX forms in a form with many parameters, I am using a solution of creating an iframe, posting the form to it by POST, and then accessing the

Answer 1

Note if you have a iframe with src='javascript:void(0)' then javascript like frame.document.location =... will fail with Access Denied error in IE. Was using a javascript library that interacts with a target frame. Even though the location it was trying to change the frame to was on the same domain as parent, the iframe was initially set to javascript:void which triggered the cross domain access denied error.

To solve this I created a blank.html page in my site and if I need to declare an iframe in advance that will initially be blank until changed via javascript, then I point it to the blank page so that src='/content/blank.html' is in the same domain.

Alternatively you could create the iframe completely through javascript so that you can set the src when it is created, but in my case I was using a library which reqired an iframe already be declared on the page.