JQuery Disable after submit

I'm sorry for asking a question that there seems to be TONS of info on, but I don't seem to be getting anywhere.

I'm simply trying to stop a double form submission from happening, I'm using the following code:

<script language="javascript" src="/js/jquery-1.6.1.min.js"></script>   
<script language="javascript">
$(document).ready(function(){
    $("#cc_form").submit(function() {
    if ($.data($("#cc_form").get(0), 'submitting')) {
        return false;
     }
     $.data($("#cc_form").get(0), 'submitting', true);
     $(".submit",$("#cc_form")).prop('disabled', true);
});     
});
</script>

It works fine in FF 4 and FF 5, it does not work in IE 8 or IE 9. In IE I get that "Object Expected" on the document.ready line. I've tried moving it from the head to just before the closing body, I tried using type=text/javascript and language=javascript, I've tried using jQuery(function().. instead of document.ready and no matter what I tried I get that error in IE and it does not stop multiple form submissions (while FF continues to work without any error).

Any Ideas?

One thing jumps out at me:

$(".submit",$("#cc_form")).prop('disabled', true);

Give this a shot:

<script language="javascript" src="/js/jquery-1.6.1.min.js"></script>   
<script language="javascript">
$(document).ready(function(){

var cc_form = $("#cc_form");
cc_form.submit(function() {
    if ($.data(this, 'submitting')) {
        return false;
     }
     $.data(this, 'submitting', true);
     $(".submit, #cc_form").attr('disabled', true); // Revert to .prop() if this is a working solution per comments
});     
});
</script>

I'm all set - I don't know what to say. Just to try something different I downloaded the uncompressed version and it WORKED!. I then download the min again and even though they are the same to the byte on the filesystem, it worked!