[jQuery] Ajax Problem?

[jQuery] Ajax Problem?


I write this simple code. I check it by using firefox and firebug and
firebug gives me that the request is successful. But I don't see the
box "ok!"??? So what is the problem?
$.ajax({
type: "GET",
url: "feed.xml",
dataType: "json",
success: function(msg){
alert("ok!");
}
});
I try another way.
$.getJSON("feed.xml", function(json){
alert("ok!');
});
and there is the same problem.
So how can I solve it?
Here is the complete file:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252">
<title>New Page 1</title>
<script language="javascript" src="jquery.js"></script>
</head>
<body>
<script language="javascript">
$.ajax({
type: "GET",
url: "feed.xml",
dataType: "json",
success: function(msg){
alert("ok!");
}
});
$.getJSON("feed.xml", function(json){
alert("ok!");
});
</script>
</body>
</html>
I don't know what happens!