function validateForm() {
  var frm = document.forms[0];

  if (frm.FirstName.value == "" || frm.FirstName.value == frm.FirstName.defaultValue ) {
    alert("Please enter your First name");
    frm.FirstName.focus();
    return false;
  }
  if (frm.LastName.value == "" || frm.LastName.value == frm.LastName.defaultValue) {
    alert("Please enter your Last Name");
    frm.LastName.focus();
    return false;
  }
  if (frm.Address.value == "" || frm.Address.value == frm.Address.defaultValue) {
    alert("Please enter your Address");
    frm.Address.focus();
    return false;
  }
  if (frm.City.value == "" || frm.City.value == frm.City.defaultValue) {
    alert("Please enter your City");
    frm.City.focus();
    return false;
  }
  if (frm.State.value == "" || frm.State.value == frm.State.defaultValue) {
    alert("Please enter your State");
    frm.State.focus();
    return false;
  }
  if (frm.Zip.value == "" || frm.Zip.value == frm.Zip.defaultValue) {
    alert("Please enter your Zip Code");
    frm.Zip.focus();
    return false;
  }
  if (frm.BusinessPhone != null) {
    if (frm.BusinessPhone.value == "" || frm.BusinessPhone.value == frm.BusinessPhone.defaultValue) {
      alert("Please enter your Phone number");
      frm.BusinessPhone.focus();
      return false;
    }
  } else if (frm.CellPhone != null) {
    if (frm.CellPhone.value == "" || frm.CellPhone.value == frm.CellPhone.defaultValue) {
      alert("Please enter your Phone number");
      frm.CellPhone.focus();
      return false;
    }
  }

  if (frm.email != null) {
    if (frm.email.value == "" || frm.email.value == frm.email.defaultValue) {
      alert("Please enter your Email address");
      frm.email.focus();
      return false;
    }
  } else if (frm.EmailAddress != null) {
    if (frm.EmailAddress.value == "" || frm.EmailAddress.value == frm.EmailAddress.defaultValue) {
      alert("Please enter your Email address");
      frm.EmailAddress.focus();
      return false;
    }
  }

  if (frm.sample != null) {
  if (frm.sample.value == "") {
    alert("Please select your sample");
    frm.sample.focus();
    return false;
  }
  }

  var submitted = document.createElement('input');
  submitted.setAttribute('type', 'hidden');
  submitted.setAttribute('name', 'submitted');
  submitted.setAttribute('id', 'submitted');
  submitted.setAttribute('value', '1');
  frm.appendChild(submitted);

  document.form.action = '';

  frm.submit();
  return false;
}