function validateForm() {
  var f = document.forms[0];
  if (f.fname.value == "") {
    alert("First Name is required");
    f.fname.focus();
    return false;
  }
  if (f.lname.value == "") {
    alert("Last Name is required");
    f.lname.focus();
    return false;
  }
  if (f.email.value == "") {
    alert("E-Mail is required");
    f.email.focus();
    return false;
  }
  if (f.phone.value == "") {
    alert("Phone Number is required");
    f.phone.focus();
    return false;
  }
  return true;
}