share javascript library between pages

share javascript library between pages

A web application is essentially one page with a bunch of popups that add and manage the data accumulated in the main or first page. The first page loads the jQuery library along with a bunch or plugins. 

The modal popups contain an iFrame whose source is a different page. The source page also contain the jQuery library and pretty well the same plugins in most cases. The pages all use jQuery as a base for most of its client side processing. 

At times the modal popups can be 4 or 5 deep. One popup is launched from the previous etc..

These libraries might total some 300k bytes or so. 

Is there some way to avoid having to reload all the libraries each time a page is loaded. How can jQuery on the main page be used by all subsequent page. 

I'd have to be using the libraries as it they were loaded as part or the page and not having to refer to the parent objects for example. 

Could some script be run at the start of each page to load the javascript library form the previous page?

Can the jQuery library or any plugin written using jQuery be regarded as a single JavaScript object that can be replicated from the parent page?