// JavaScript Document
function checkForm() {
firstname = document.getElementById("firstname").value;
  email = document.getElementById("email").value;
  comment = document.getElementById("comment").value;
 
  if (firstname == "") {
  hideAllErrors();
document.getElementById("firstnameError").style.display = "inline";
document.getElementById("firstname").select();
document.getElementById("firstname").focus();
  return false;

  return true;
  }
 
  function hideAllErrors() {
document.getElementById("firstnameError").style.display = "none"

  }