This is iframe2. Type something in the box, and click send:<br>
<input type="text" id="textBox" onchange="updateLink(this)">

<a id="link" href="javascript:" target="test1">Send</a>

<script>
function updateLink(box) {
	var elm = document.getElementById("link");
	link.href = "javascript:writeMessage('" + box.value + "')";
}
alert(window.frames);
</script>