Modify an elements value in an iFrame. Remember, cross site access to iFrame properties is not possible (security).

<script>
setTimeout(function() {
var iframe = document.getElementById('myframe1');
var innerDoc = (iframe.contentDocument) ? iframe.contentDocument : iframe.contentWindow.document;
var x = innerDoc.getElementsByClassName("place-name");
x[0].innerHTML = "Hello World!";
},5000);
</script>