Source code of this page

<iframe style="display:none;" src="http://test.tomhoppe.com/testIframe.html" width="0" height="0" id="xmlFrame" name="xmlFrame"></iframe>
<div id="stuff"></div>
<script type="text/javascript">
document.domain = 'tomhoppe.com';

function dropData(data) {
document.getElementById('stuff').innerHTML = data;
}
</script>

Source code of http://test.tomhoppe.com/testIframe.html

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js"></script>

<script type="text/javascript" language="javascript">
document.domain = 'tomhoppe.com';

$.get("test.html", function(returned_data) {
       parent.dropData(returned_data);
});
</script>