function check(form) {
 if (form.first_name.value == '' || form.last_name.value == '' || form.address.value == '' || form.state.value == '' || form.zip_code.value == '' || form.email.value == '' || form.phone.value == '' || form.company.value == '' || form.position.value == '' || form.choice.value == '') { 
  alert('Fill all nessesery fields'); 
  return true; 
 } 
}