How do I give JavaScript variables data from ASP.NET variables?

I have created a SCORM API for our LMS and right now I am using hard coded userID and courseID variables (variables that reference things in the database). I need to pass the real userID and courseID instead of using hard coded ones. I know the userID is stored in the session and the courseID is passed over from the launch page.

Multiple Windows using window.open()

So as we all know if you click on a submit button that has embedded in it a onClick(windown.open(...)) this opens a new window with all the lovely attributes you specify. However if then proceed to click on the parent window and again click on the ‘submit’ button without closing the previous popup window, then that same window is overwritten with the new data.