jQuery in widget

Question

I want to use jQuery in an add on JS library that can be added to random websites. These websites may or may not use jQuery already.

I have 3 questions around this a

Answer 1

You can try the solution in the following link if it works for you. Basically, there is a plugin that creates widgets on the fly and then asynchronously requests another page url, and sets the returned content as inner html of the widget.

http://sites.google.com/site/spyderhoodcommunity/tech-stuff/jquerydashboardwidgetplugin

Answer 2

This is pretty loose and incomplete -- and really is meant to be a starting point:

if (typeof $ != 'undefined') {
    var msg = 'This page already using jQuery v' + $.fn.jquery;
} else {
    var s = document.createElement('script');
    s.setAttribute('src', 'http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.js');
    document.getElementsByTagName('head')[0].appendChild(s);
    var msg = 'This page is now jQuerified';
}

then wait via a brief setTimeout() before running a ready() function