Javascript not working inside advanced action

If you wish to reuse the script across multiple buttons - you can substitute variables for the numeric values and pass in different values for each button.

See the code below.

// place this code as an onEnter action

// declare the variable to hold the starting frame
var frameStart;

// This function will serve to back up a project
// The function will take three parameters
// numFrames will denote the number of frames to back up each execution
// totalFrames will denote the total overall frames to be backed up
// freqTime will be the timeframe that we move back by the numFrames variable

function backUp(numFrames,totalFrames,freqTime) {
  setTimeout(function() {
    cpCmndGotoFrame = cpInfoCurrentFrame - numFrames;
    if (cpInfoCurrentFrame > frameStart - totalFrames) {
      backUp(numFrames,totalFrames,freqTime);
    }
  },freqTime);
}

Now you could have three different buttons with minimum code.

// Capture the starting frame
var frameStart = cpInfoCurrentFrame;

// call the function
// 1 frame at a time
// a total of 25 frames
// every half second
backUp(1, 25, 500);

----------------------------------------

// Capture the starting frame
var frameStart = cpInfoCurrentFrame;

// call the function
// 1 frame at a time
// a total of 10 frames
// every half second
backUp(1, 10, 500);

----------------------------------------

// Capture the starting frame
var frameStart = cpInfoCurrentFrame;

// call the function
// 1 frame at a time
// a total of 25 frames
// every 50 milliseconds
backUp(1, 25, 50);

Adjust the values as needed to achieve the desired effect.

Be sure to keep the function itself in the onEnter action so that they can keep a proper scope.

This is very similar to the advanced action which I had in mind, although I would have preferred to have two parameters instead of the literals 25 and 40. 

Do you have other commands in the advanced action?