How to extend jQuery from CDN?

I'm currently using a jQ开发者_如何学Cuery resides on my own FTP together with other web files. I am thinking of using a jQuery from CDN since suggested by the YSlow. The question is, how can I extend that jQuery? Or in other words, how can I add custom functions to it? I don't think I can edit that? Ha-ha! Thanks!

You use a separate file with your own functions in it.

Any extension to jQuery should probably be done through its own plug-in mechanism.

Whether the jQuery library comes from your own server or a CDN, you'll add new functions in the same way.

jQuery.fn.yourCustomFunction = function(){};

This will be done inside your own Javascript files and you should never be editing the actual jQuery library file.