A Photoshop script to automate save for web as JPEG. Save the file as using jsx extenstion. Then in Photoshop go to "File-Scripts-Browse..." to load the file. This script will overwrite the existing output file if it already exists.

ps_save_jpeg.jsx

// Utils
function trace() {
  $.writeln.apply($, arguments);
}

// Construct the dialog layout
var layoutInfo = "dialog{\
  text: 'Save for Web in JPEG',\
  info: Panel {\
    orientation: 'column',\
    alignChildren: 'left',\
    text: 'Source and Output Settings',\
    input: Group{\
      orientation: 'row',\
      label: StaticText { text: 'Input:', size: [ 60, 24 ] },\
      el: EditText { characters: 30 },\
      btn: Button { text: 'Choose...' }\
    },\
    output: Group{\
      orientation: 'row',\
      label: StaticText { text: 'Output:', size: [ 60, 24 ] },\
      el: EditText { characters: 30 },\
      btn: Button { text: 'Choose...' }\
    },\
    quality: Group{\
      orientation: 'row',\
      label: StaticText { text: 'Quality:', size: [ 60, 24 ] },\
      el: EditText { characters: 3 },\
      label: StaticText { text: '(1-100)' }\
    }\
  },\
  buttons: Group {\
    orientation: 'row',\
    cancelBtn: Button { text: 'Cancel', properties: { name: 'cancel' } },\
    okBtn: Button { text: 'OK', properties: { name: 'ok' } }\
  }\
}";
var dialog = new Window(layoutInfo);

// Get references of all the buttons and inputs
// Need to update the properties if layout changes
var inputGroup = dialog.children[0].children[0];
var outputGroup = dialog.children[0].children[1];
var qualityGroup = dialog.children[0].children[2];

var chooseInputBtn = inputGroup.children[2];
var chooseOutputBtn = outputGroup.children[2];
var okBtn = dialog.children[1].children[1];

var inputBox = inputGroup.children[1];
var outputBox = outputGroup.children[1];
var qualityBox = qualityGroup.children[1];

// Event binding
chooseInputBtn.onClick = chooseInput;
chooseOutputBtn.onClick = chooseOutput;
okBtn.onClick = runAction;

// Handle events
function chooseInput(e) {
  var directory = Folder.selectDialog('Choose the folder of source images');
  if (directory) inputBox.text = directory;
}

function chooseOutput(e) {
  var directory = Folder.selectDialog('Choose the output folder');
  if (directory) outputBox.text = directory;
}

function runAction(e) {
  if (
    inputBox.text.length === 0 ||
    outputBox.text.length === 0
  ) {
    return alert('Please check your input or output directory');
  }

  var quality = parseInt(qualityBox.text, 10);
  if (quality < 1) quality = 1;
  else if (quality > 100) quality = 100;
  else if (!quality) quality = 75;

  var inputFiles = readInputFolder(inputBox.text);
  if (!inputFiles) return;

  dialog.close();

  for (var i = 0; i < inputFiles.length; i++) {
    if (!inputFiles[i] instanceof File) continue;
    saveForWebAsJpeg(inputFiles[i], quality);
  }

  alert('Done');
}

/**
 * Get image files from a folder.
 * This method doesn't go into subfolders.
 * @param {string} path - The directory
 * @return {array} An array of File instances or undefined if the folder doesn't exist.
 */
function readInputFolder(path) {
  var folder = new Folder(path);
  if (!folder) return alert("Can't find the input folder");

  return folder.getFiles(/\.(jpe?g|tif|psd|bmp|gif|png)$/i);
}

/**
 * Saves a file using save for web command as JPEG,
 * using a user defined quality setting.
 * The quality and output path is set in the initial dialog box.
 * @param {object} file - A photoshop script File instance
 * @param {quality} number - The quality of the produced image as a percentage
 */
function saveForWebAsJpeg(file, quality) {
  var saveOptions = new ExportOptionsSaveForWeb();
  saveOptions.format = SaveDocumentType.JPEG;
  saveOptions.quality = quality;

  var saveFile = new File(outputBox.text + '/' + file.name.replace(/\.[^\.]+$/, '') + '.jpg');
  if (saveFile.exists) saveFile.remove();

  app.open(file);
  app.activeDocument.exportDocument(saveFile, ExportType.SAVEFORWEB, saveOptions);
  app.activeDocument.close(SaveOptions.DONOTSAVECHANGES);
}

// Show the modal dialog view
dialog.center();
dialog.show();

Could you please help me scripting a Save As animated GIF with "loop forever" and name, as a layer name?

I have the script blow that saves JPG using a layer name. It works great.

I am trying to update this script so, that it would save animated GIF with "loop forever" option.

It would be just awesome if there is a possibility to set in the script quantity of GIF's colors (64, 128, 256), Transparency, Dithering and other parameters.

Any help would be greatly appreciated!

#target photoshop
main();
function main(){
if(!documents.length) return;
try{
var Path= activeDocument.path;
}catch(e){var Path = "~/desktop";}
var Name = decodeURI(app.activeDocument.name).replace(/.[^.]+$/, '');
var layerName = app.activeDocument.activeLayer.name.replace(/[:/\*?"<>|]/g, "_");
var saveFile= new File(Path + "/" + Name + "-" + layerName + ".jpg");
SaveForWeb(saveFile,80);
}
function SaveForWeb(saveFile,jpegQuality) {
var sfwOptions = new ExportOptionsSaveForWeb();
sfwOptions.format = SaveDocumentType.JPEG;
sfwOptions.includeProfile = false;
sfwOptions.interlaced = 0;
sfwOptions.optimized = true;
sfwOptions.quality = jpegQuality;
activeDocument.exportDocument(saveFile, ExportType.SAVEFORWEB, sfwOptions);
}