accessing php javascript object in asp.net user control

I have a website in php which is using 4 frames(top, left, middle and right). The middle frame contains the web user control coded in asp.net. Now, in the right frame( which is coded in php ) some javascript con开发者_JS百科tains the id of the items selected in right frame. I need to get those ids to the middle frame on asp.net user control. How can i do this?

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You need to access the parent page and then access all its iframes.

Some answers to doing that are here:

How to access parent Iframe from javascript

Invoking JavaScript code in an iframe from the parent page

etc.