Question

Possible Duplicate:
Is it possible to call Javascript function in parent document from JS in iframe?

I have a main.php page.

This contains an iframe which src is random.php.

How can I have script in the main.php with a random function, random(), and let random.php use that function?

Answer 1

If you are working with HTML5, you can use the postMessage() function..

here is a nice demo:

http://html5demos.com/postmessage

UPDATE

The idea is to postMessage to the iframe window object, each window is listening to the message event like so:

In your main.php:

window.addEventListener("message", function(e){
    var data = e.data; // data can be any object for example { type: 'random', payload: {}... }
    switch(data.type){
        case 'random':
            // do somthing here with the payload...
            break;
    }
});

in your iframe (random.php):

window.parent.postMessage({ type: 'random', payload: {...} });