Batch Convert EPS to PDF

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var selectFile = File.openDialog("select your files", (Multiselect = true));
for (var i = 0; i < selectFile.length; i++) {
  var openFiles = app.open(File(selectFile[i]));
}
var cntDocs = app.documents.length;
for (i = 0; i <= cntDocs - 1; i++) {
  app.executeMenuCommand("fitin");
  
  try {
    // uncomment to suppress Illustrator warning dialogs
    // app.userInteractionLevel = UserInteractionLevel.DONTDISPLAYALERTS;

    if (app.documents.length > 0) {
      var doc = app.activeDocument;
      // Get the folder to save the files into
      var destFolder = null;
      destFolder = doc.path.fsName;

      if (destFolder != null) {
        var options, i, sourceDoc, targetFile;

        // Get the PDF options to be used
        options = this.getOptions();
        // You can tune these by changing the code in the getOptions() function.

        for (i = 0; i < app.documents.length; i++) {
          sourceDoc = app.documents[i]; // returns the document object

          // Get the file to save the document as pdf into
          targetFile = this.getTargetFile(sourceDoc.name, ".pdf", destFolder);

          // Save as pdf
          sourceDoc.saveAs(targetFile, options);
        }
        //alert( 'Documents saved as PDF' );
      }
    } else {
      throw new Error("There are no document open!");
    }
  } catch (e) {
    alert(e.message, "Script Alert", true);
  }

  /** Returns the options to be used for the generated files.
	@return PDFSaveOptions object
*/
  function getOptions() {
    // Create the required options object
    var options = new PDFSaveOptions();
    // See PDFSaveOptions in the JavaScript Reference for available options

    // Set the options you want below:

    // For example, uncomment to set the compatibility of the generated pdf to Acrobat 7 (PDF 1.6)
    // options.compatibility = PDFCompatibility.ACROBAT7;

    // For example, uncomment to view the pdfs in Acrobat after conversion
    // options.viewAfterSaving = true;

    return options;
  }

  /** Returns the file to save or export the document into.
	@param docName the name of the document
	@param ext the extension the file extension to be applied
	@param destFolder the output folder
	@return File object
*/
  function getTargetFile(docName, ext, destFolder) {
    var newName = "";

    // if name has no dot (and hence no extension),
    // just append the extension
    if (docName.indexOf(".") < 0) {
      newName = docName + ext;
    } else {
      var dot = docName.lastIndexOf(".");
      newName += docName.substring(0, dot);
      newName += ext;
    }

    // Create the file object to save to
    var myFile = new File(destFolder + "/" + newName);

    // Preflight access rights
    if (myFile.open("w")) {
      myFile.close();
    } else {
      throw new Error("Access is denied");
    }
    return myFile;
  }
}

app.userInteractionLevel = UserInteractionLevel.DONTDISPLAYALERTS;
for (ii = 0; ii <= cntDocs - 1; ii++) {
  app.executeMenuCommand("close");
  doc = null;
}