Stripping first 4 characters from an 8 character file name in a script?

[Fjuds]

I have a script to add the file number to the front of the image for proofing. I would like to remove the first 4 characters in the 8 character file name in the script.

I don't code so I'm looking for the lines of code to add to the script.

It would help reduce paperwork errors when we show portraits.

Thanks for any help,

Fjuds

// this script is a variation of the script addTimeStamp.js that is installed with PH7
if ( documents.length > 0 )
{
  var originalRulerUnits = preferences.rulerUnits;
  preferences.rulerUnits = Units.PIXELS;
  try
  {
  var docRef = activeDocument;
  // Now create a text layer at the front
  var myLayerRef = docRef.artLayers.add();
  myLayerRef.kind = LayerKind.TEXT;
  myLayerRef.name = "Filename";
  var myTextRef = myLayerRef.textItem;
  // strip the extension off
  var fileNameNoExtension = docRef.name;
  fileNameNoExtension = fileNameNoExtension.split( "." );
  if ( fileNameNoExtension.length > 1 ) {
  fileNameNoExtension.length--;
  }
  fileNameNoExtension = fileNameNoExtension.join(".");
  myTextRef.contents = fileNameNoExtension;
  // off set the text to be in the bottom center
  myTextRef.position = new Array( docRef.width / 3, docRef.height / 1.03 );
  myTextRef.size = 60;
  }
  catch( e )
  {
  // An error occurred. Restore ruler units, then propagate the error back
  // to the user
  preferences.rulerUnits = originalRulerUnits;
  throw e;
  }
  // Everything went Ok. Restore ruler units
  preferences.rulerUnits = originalRulerUnits;
}
else
{
  alert( "You must have a document open to add the filename!" );
}

[Bernd Alheit]

This doesn't look like JavaScript for Adobe Acrobat.

[Fjuds]

Sorry, First time trying a form and posted to the wrong group. Its a Photoshop script.

[try67]

[Question moved to Photoshop Scripting]

[Chuck Uebele · Accepted solution]

You can put this line after line 23:

var shortName = fileNameNoExtension.substr (4)