This will be a manual process ... and to be honest: Good luck with that. jQuery includes a lot of stuff that deals with browser dependent behaviour and if you want to transform all of it, that would be a major task. Some of the more general commands might be easily transformable though.
Example
Code:
$('#myelement').attr('src', 'http://www.google.de');
// will become this for all browsers:
document.getElementById('myelement').src = 'http://www.google.de';
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