How to put Jquery Ajax request with priority

I have a web page with multiple ajax requests to load SVG preview images. On the same page, I have several buttons that use ajax to load the content used in the jquery dialog.

My problem is the jquery dialog's loading time is too long because other requests have not completed.

I would like to know if it is possible to cancel the whole request in order to send the priority request and when it is done I will send the rest?

When the page is ready, a request to load the SVG is sent. If the user clicks a button to load the dialog, the request to load the contents of the dialog should take precedence.

thanks for the help