[jQuery] Security Error: Content may not load data from

[AsymF]

When I execute the following code:
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$.getJSON('/apps/sendnote.php?a=1&id=5', function (id, status_text) { /
*func code here*/ });
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I get the error:
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uncaught exception: Security Error: Content at https://www.mysite.com/
may not load data from http://www.mysite.com/apps/sendnote.php?a=1&id=5
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This happens in Firefox 2.

How can I get jQuery to send the AJAX request through the proper
protocol? It is a mixed bag as to whether the page it is called from
will be http or https.