var form = "";
var submitted = false;
var error = false;
var error_message = "";

function check_input(field_name, field_size, message) {
  if (form.elements[field_name] && (form.elements[field_name].type != "hidden")) {
    var field_value = form.elements[field_name].value;

    if (field_value == '' || field_value.length < field_size) {
      error_message = error_message + "* " + message + "\n";
      error = true;
    }
  }
}

function check_form(form_name, bmail) {
  if (submitted == true) {
    alert("This form has already been submitted. Please press Ok and wait for this process to be completed.");
    return false;
  }

  error = false;
  form = form_name;
  error_message = "Note: All fields marked * are required.\nYou failed to enter the required field information:\n\n";


  check_input("txtname", 2, "Your Name must contain a minimum of 2 characters.");
  if (bmail) {
    check_input("txtemail", 6, "Your E-Mail Address must contain a minimum of 6 characters.");
  }
  check_input("txttext", 3, "Your Text must contain a minimum of 3 characters.");

  if (error == true) {
    alert(error_message+"\nPlease, try again.\n");
    return false;
  } else {
    submitted = true;
    return true;
  }
}