The very first sample in the W3School AJAX tutorial at http://www.w3schools.com/ajax/default.asp is not working for me. In this simple example, the time from the server is supposed to appear in the second textbox as I begin to type in the first textbox. Nothing happens at all, though. There are two pages in this example: testAjax.htm and time.asp. Both are hosted in the same folder.

Here is the unaltered code for testAjax.htm:
<html>
<body>
<script type="text/javascript">
function ajaxFunction()
{ var xmlHttp;
try
{ // Firefox, Opera 8.0+, Safari xmlHttp=new XMLHttpRequest(); }
catch (e)
{ // Internet Explorer try
{ xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e)
{ try
{ xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e)
{ alert("Your browser does not support AJAX!"); return false;
}
}
}
xmlHttp.onreadystatechange=function()
{
if(xmlHttp.readyState==4)
{
document.myForm.time.value=xmlHttp.responseText;
}
}
xmlHttp.open("GET","time.asp",true);
xmlHttp.send(null);
}
</script>
<form name="myForm">
Name: <input type="text" onkeyup="ajaxFunction();" name="username" /> Time: <input type="text" name="time" />
</form>
</body>
</html>
=============================
Here is the code for time.asp:
<%
response.expires=-1
response.write(time)
%>
=============================

If I visit time.asp directly, I get the correct time. If I visit testAjax.htm and begin to type in the name field, nothing happens. I tried it in FF and IE. I'm on Windows 2005 Server, so ASP is not an issue, either. Do I need to make an IIS change for this to work?

Thanks for any help.
Patrick