AppleScript / saving file to a relative path

Hello everybody,

I would like to make a script that saves current file to a relative path. For example: I have a psd opened file (that is in pictures/01/image01.psd) and I need to save it one level up as a JPEG ( pictures/image01.psd).

This is what I've tried, however, the result is that the file is saved in the root of Photoshop - in applications folder:

tell application "Adobe Photoshop CS6"

          set myFile to "./"

          set myOptions to ¬

                    {class:JPEG save options, embed color profile:false, format options:standard, matte:background color matte} ¬

  save current document in file myFile as JPEG with options ¬

  myOptions appending no extension without copying

end tell

Thanks in advance