function check_form(form_name) {

  if (submitted == true) {
    alert("Error submition");
    return false;
  }


  error = false;
  form = form_name;
  error_message = "The form has errors on it!\n\n";


  check_input("frm_fname", 2, "Your First name should be at least 2 letters long!");
  check_input("frm_sname", 2, "Your Last name should be at least 2 letters long!");
  check_input("frm_email", 6, "Email address should be at least 6 letters long!");
  validate_email("frm_email", "Valid email address required!");
  validate_numbers("frm_imei", "Sorry - Only digits are accepted in IMEI number!", "Please complete IMEI number correctly, It must be 15 digits long!");

  check_checkbox("frm_terms", 1, "Please Agree to Terms & Conditions!");

  if (error == true) {
    alert("\n" + error_message + "\nPlease, complete the form.\nThanks!\n");
    return false;
  }

  submitted = true;
  return true;
}