function checkForm() {
  company = document.getElementById("company").value;
  first_name = document.getElementById("first_name").value;
  last_name = document.getElementById("last_name").value;
  email = document.getElementById("email").value;
  phone = document.getElementById("phone").value;
 
  if (company == "") {
  hideAllErrors();
document.getElementById("companyError").style.display = "inline";
document.getElementById("company").select();
document.getElementById("company").focus();
  return false;
  } else if (first_name == "") {
hideAllErrors();
document.getElementById("first_nameError").style.display = "inline";
document.getElementById("first_name").select();
document.getElementById("first_name").focus();
  return false;
  } else if (last_name == "") {
hideAllErrors();
document.getElementById("last_nameError").style.display = "inline";
document.getElementById("last_name").select();
document.getElementById("last_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 (phone == "") {
hideAllErrors();
document.getElementById("phoneError").style.display = "inline";
document.getElementById("phone").select();
document.getElementById("phone").focus();
  return false;
  }
  return true;
  }
 
  function hideAllErrors() {
document.getElementById("companyError").style.display = "none"
document.getElementById("first_nameError").style.display = "none"
document.getElementById("last_nameError").style.display = "none"
document.getElementById("emailError").style.display = "none"
document.getElementById("phoneError").style.display = "none"
  }