I think what you need is a java script timer built into the code that will automatically click the continue button after the specified time. The example posted in the following link does something like this to make the continue button appear after x seconds. I'm guessing it could be modified pretty easily to have it clicked rather than appear. Take a look and see if you see what I mean:

http://www.empirisoft.com/support/showthread.php?t=1178