Iframe problem and overlay

I am using an iframe to embed content from another site. The button in the iframe opens an overlay with a form. The problem is when the button is clicked, the 开发者_开发百科overlay does not open fully. The problem is not from the overlay but from the iframe and parent.

The site i am testing on is at www.sycotickets.com/form.php. you can check it and click on the button at the bottom to see the problem. I also learnt javascript can be used to embed. Can anyone please pint me in the right direction on both issues?

There are 2 possible answers when using AJAX to load page content from a different server

1) Both servers are in a similar domain (s1.example.com, s2.example.com) in which case, you can set the domain to simply be example.com which allows full functionality withing AJAX calls.

2) Servers are on completely different domain - The server which provides the content (currently for the IFrame) must provide the data using the JSONP protocol (note the P!) this means the resulting data is loaded into a script tag which then executes. The data itself contains a JS function call eg:

{data: '<pre>Some Html</pre>'}

is actually returned as:

function SomeFuncNameSpecifiedInTheRequest({data: '<pre>Some Html</pre>'});

Instead of doing an AJAX call, you dynamically add a script tag to the page, something like:

<script type="text/javascript" src="http:/www.example.com/GetMyData.php?WrapperFunction=SomeFuncNameSpecifiedInTheRequest">

You then implement SomeFuncNameSpecifiedInTheRequest on your page and process the results when it's called. JQuery implements this functionality for you automatically (at least the client-side bit.)

See here for more information on JSONP and here for more information on setting the domain

Nothing you can do really. If it's loading from an external site browsers prevent you as a developer from accessing other sites and modifying them to try and prevent XSS attacks. You could try to fake it by moving the iframe where you want it dynamically and overlaying the black on click on your end... but that seems pretty kludgy...