<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<body>
<iframe src='index.html' id='frame'></iframe>
<script type='text/javascript'>
document.getElementById("frame").onload = function()
{
var FRAM = document.getElementById("frame");
var DOC = FRAM.contentDocument;
alert(FRAM.contentDocument.getElementById('date'));//выведет Object HTML..
alert(DOC.getElementById('date'));//выведет NULL(WTF?)
}
</script>
</body>
</html><html>
<body>
<iframe src='index.html' id='frame'></iframe>
<script type='text/javascript'>
document.getElementById("frame").onload = function () {
var FRAM = document.getElementById("frame");
var DOC = FRAM.contentDocument;
alert(FRAM.contentDocument.body);
}
</script>
</body>
</html>