Question

Is it possible to pass a varible into and out <iframe>?
The problem is that i have data display in <iframe>, but all controls and data-sending / recieving scripts in parent frame.

Answer 1

If you want to give the iframe values on page load, then you can pass the value as a GET parameter in the iframe‘s URL. If you want to send values back and forth after that (and both the parent and child are on the same domain, as you stated), then you can use JavaScript. For example:

// in parent page
function receiveDataFromIFrame(data) {
    console.log("Received data from iframe:", data);
}

// in child page
function onLoad() {
    var data = "data from iframe";
    window.parent.receiveDataFromIFrame(data);
}