Get Windows 7 To Put Buttons In Order Of Way The Programs Are Opened And Not Rearrange Them?

In regards to the order of the program buttons on the task bar, is there a way to get Win7 to put the buttons in order of the way the programs are opened and not rearrange them? For example, I usually have my mailbox and my web browser open. (Nothing pinned to the task bar.) Mail is on the far left, browser is directly to the right of mail. If I go into mail and open an item in my inbox, I would expect (and like) the new task that shows in the task bar to be positioned to the right of the Browser button. Instead, it inserts itself to the right of Mail and pushes the Browser button to the right.