destructors

hi, i understand that there are no "destructors" in php, but is there a way to hack around it? what i am trying to do is to measure the amount of time that someone spends on reading a particular webpage (with a timer class that i am writing)... i can grab a timestamp upon the execution of the page (as part of the constructor), but i want to be able to grab another timestamp when the user clicks out of the particular page... destructors would be great for exactly this purpose, but alas. :P any ideas, thoughts, and insights on this wil be greatly appreciated. :) thanx in advance!! ---------------- remco chang bountyquest.com