I have an image that already has an onClick event (a simple window.print(); command). I am trying to figure out how I can add another function to this onClick so when a user clicks this button not only will the print window appear but another js function will also fire off. How do I accomplish this? Unfortunately I am not able to simply manually add the function to the onClick so is there a way to listen for all "window.print();" events and send a second event (my js function) at that time?