jQuery & plugins no-conflict in bookmarklet

Question

I have a complex bookmarklet that does many things, and rely
heavily on jQuery and some plugins (ui, easing, ect. )

Thing is, I don't know if jQuery or any other plugins are already
included in the current page, so I mustn't conflict them,
but also needs my files to be maintainable.

Do anyone have any ideas how to accomplish this?
some sort of Clousers perhaps?

it is VERY important that my appended jQuery.UI library won't collide with the page's ones.

Answer 1

Check the Documentation entry about this.

jQuery usually works nicely together with prototype and other libs that use the $ keyword.

Edit: Using the jQuery.noConflict() trick will prevent trouble with other libraries (prototype, mootools, etcetera).

You can always check if jQuery is already included before including it yourself:

<script language="javascript">
    if(!jQuery){
        document.write('<script type="text/javascript" src="/js/jQuery.js"></script>');
    }
</script>

Answer 2

The easiest way is to include this at the beginning of your bookmarklet:

$myjq = jQuery.noConflict();

For the rest of the program, use $myjq instead of just $, like so:

$myjq("#someId");