function checkForm() {

name = document.getElementById("name").value;

  email = document.getElementById("email").value;

  comment = document.getElementById("comment").value;

  

  if (name == "") {

  hideAllErrors();

document.getElementById("nameError").style.display = "inline";

document.getElementById("name").select();

document.getElementById("name").focus();

  return false;

  } else if (email == "") {

hideAllErrors();

document.getElementById("emailError").style.display = "inline";

document.getElementById("email").select();

document.getElementById("email").focus();

  return false;

  } else if (comment == "") {

hideAllErrors();

document.getElementById("commentError").style.display = "inline";

document.getElementById("comment").select();

document.getElementById("comment").focus();

  return false;

  }

  return true;

  }

 

  function hideAllErrors() {

document.getElementById("nameError").style.display = "none"

document.getElementById("emailError").style.display = "none"

document.getElementById("commentError").style.display = "none"

  }