Javascript iFrame

From https://www.dyn-web.com/tutorials/iframes/

<style>
iframe#ifrm {
    width: 50%;
    margin: 0 25%;
    height: 150px;
    border: 1px solid #ccc;
    margin-top: .8em;
}
</style>

<div id="framer"></div>

<script>
var ifrm = document.createElement('iframe');
ifrm.setAttribute('id', 'ifrm'); // assign an id

// document.body.appendChild(ifrm); // to place at end of document

// to place before another page element
var el = document.getElementById('framer');
el.parentNode.insertBefore(ifrm, el);

// assign url
ifrm.setAttribute('src', 'https://denvergeeks.com');
</script>