Is there a way to UPLOAD the music library FROM my ipod to itunes on my computer?

The library on my itunes account was cleared, it is however on my ipod and would like to re-load (up-load) the entire library on to itunes on my computer.

Is this possible, i tried the import playlist function but it didn't work. I want to back up my extensive music library on my ipod to another source.(my computer)