how to change corner radius in the line.... myPageItem.convertShape(ConvertShapeOptions.CONVERT_TO_ROUNDED_RECTANGLE);

main();

function main(){

  if (app.documents.length != 0){

  if (app.selection.length > 0){

  for(myCounter = 0; myCounter<app.selection.length; myCounter++){

  myPageItem = app.selection[myCounter].duplicate();

  myPageItem.convertShape(ConvertShapeOptions.CONVERT_TO_ROUNDED_RECTANGLE);

  var myFlapLeft = 20;

  var myFlapRight = 20;

  var myFlapTop = 40;

  var myFlapBottom = 40;

  var myTaperV = 4;

  var myTaperH = 2;

  switch(myPageItem.constructor.name){

  case "Rectangle":

  for(myPathCounter = 0; myPathCounter < myPageItem.paths.length; myPathCounter++){

  myPath = myPageItem.paths.item(0);

  shapeH(myPath, myFlapLeft, myFlapRight, myFlapTop, myFlapBottom, myTaperH, myTaperV);

  }

  break;

  default:

  alert("This script works only for rectangles!!");

  break;

  }

  }

  }

  else{

  alert("Please select an object and try again.");

  }

  }

  else{

  alert("Please open a document, select an object, and try again.");

  }

}