function get_header(){
  var phone_number = document.sendsms.phone.value;
  var industry_text = document.sendsms.industry.value;
  var message_text = document.sendsms.message.value;

  var header = "http://access.m4u.com.au/trial/sendsms.php?phone="+phone_number+"&industry="+industry_text+"&message="+message_text+"&country=AU";
  return header;
}