AppleScript Managing Windows

I want to make my window to the frontmost -1. I have an application that activates Safari to run a JavaScript once every two minutes when I've been away from my computer for more than 30 minutes. However, when the script is done I want Safari to go frontmost -1. So that the same window is frontmost as it was when I left my computer.

I know that I can just hide or minimize my Safari window, but that's not what I want :-) Any ideas?

Rather than having Safari go frontmost minus 1, what you could do is make whatever the previous app was become frontmost. Since Safari is currently frontmost, this will make Safari frontmost minus 1.

Here is an app that will remember the name of the current active app, activate Safari, and then return to the previous active app.

on idle
    tell application "System Events"
        -- remember the current active app
        set currentActiveApp to first process where it is frontmost
        set activeAppName to name of currentActiveApp

        display notification activeAppName

        tell application "Safari"
            --do stuff with Safari that makes it frontmost
            activate
        end tell

        --make sure we have had time to switch to Safari
        repeat while (currentActiveApp is frontmost)
            delay 0.4
        end repeat
        --delay so that we can see we are in Safari
        delay 2

        --return to previous application
        display notification "Returning to " & activeAppName
        set frontmost of currentActiveApp to true
        delay 2

    end tell

    --do it all over in ten seconds
    return 10
end idle