jQuery.ajax() uses current page URL instead of specified URL

If I make this call on a page such as index.php:

jQuery.ajax("keepalive.php");

jQuery makes a request for index.php instead of keepalive.php.

This request is only to keep a session going, so I don't care about the result. According to the docs, simply specifying a URL is all that is needed. Any thoughts on why this doesn't work correctly?

Your code will work only if you're using jquery >= 1.5. For maximum compatibility, use the following:

jQuery.ajax({
    url: 'keepalive.php'
});

This code will run in any jquery version. Hope this helps.