// Selecting the iframe element var frame = document.getElementById("Iframe"); // Adjusting the iframe height onload event frame.onload = function () // function execute while load the iframe { // set the height of the iframe as // the height of the iframe content frame.style.height = frame.contentWindow.document.body.scrollHeight + 25 + 'px'; // set the width of the iframe as the // width of the iframe content frame.style.width = frame.contentWindow.document.body.scrollWidth + 'px'; }