javascript writing javascript

I have a page that I’m using javascript on heavily. when the user clicks a button, i want it to write a new document based on the information the user’s selected on the first page. The catch is this: on this new document I also want some javascript that the user can use to further manipulate the information they’ve selected. so far, when telling the javascript on page 1 to write javascript for page 2, it doesn’t put anything in the file. is there any way around this?

thanks