function autosize(tx) {
  for (let i = 0; i < tx.length; i++) {
    tx[i].setAttribute("style", "height:" + (tx[i].scrollHeight) + "px;overflow-y:hidden;");
    tx[i].addEventListener("input", OnInputAutoSize, false);
  }
}
function OnInputAutoSize() {
  this.style.height = "auto";
  this.style.height = (this.scrollHeight) + "px";
}