seamless-iframe.js

gistfile1.js

/**

    USAGE:

    Just load the script in the page loaded by the iframe.

    <script src="seamless-iframe.js"></script>

**/

(function(doc, iframe){

    // exit if page is not within an iframe
    if (!iframe) return;

    setInterval((function(h, idle) {

        idle = function() {

            if (doc.body && doc.body.scrollHeight != h) {
                h = doc.body.scrollHeight;
                iframe.style.height = h+'px';
            }

            return idle;
        };

        return idle();

    })(-1), 50);

})(document, window.frameElement);