i just went through the [color=#800080]Launch a Centered Pop-Up Window[/color] tutorial and successfully launched my own pop-up window. however, i noticed that there is a third window that appears between the launch window (the page that has the button to launch the pop-up window) and the pop-up window. this third page has the word “object” in brackets in the upper left hand corner. why is this happening and how do i get rid of it?