/*
	functions to check input fields in forms to ensure they are all
	filled in before submitting

	Retrieved from Zen-Cart (www.zen-cart.org)

*/
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_radio(field_name, message) {
	var isChecked = false;

	if (form.elements[field_name] && (form.elements[field_name].type != "hidden")) {
		var radio = form.elements[field_name];

		for (var i=0; i<radio.length; i++) {
			if (radio[i].checked == true) {
				isChecked = true;
				break;
			}
		}

		if (isChecked == false) {
			error_message = error_message + "* " + message + "\n";
			error = true;
		}
	}
}

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

		if (field_value == field_default) {
			error_message = error_message + "* " + message + "\n";
			error = true;
		}
	}
}

function check_password(field_name_1, field_name_2, field_size, message_1, message_2) {
	if (form.elements[field_name_1] && (form.elements[field_name_1].type != "hidden")) {
		var password = form.elements[field_name_1].value;
		var confirmation = form.elements[field_name_2].value;

		if (password == '' || password.length < field_size) {
			error_message = error_message + "* " + message_1 + "\n";
			error = true;
		} else if (password != confirmation) {
			error_message = error_message + "* " + message_2 + "\n";
			error = true;
		}
	}
}

function check_password_new(field_name_1, field_name_2, field_name_3, field_size, message_1, message_2, message_3) {
	if (form.elements[field_name_1] && (form.elements[field_name_1].type != "hidden")) {
		var password_current = form.elements[field_name_1].value;
		var password_new = form.elements[field_name_2].value;
		var password_confirmation = form.elements[field_name_3].value;

		if (password_current == '' || password_current.length < field_size) {
			error_message = error_message + "* " + message_1 + "\n";
			error = true;
		} else if (password_new == '' || password_new.length < field_size) {
			error_message = error_message + "* " + message_2 + "\n";
			error = true;
		} else if (password_new != password_confirmation) {
			error_message = error_message + "* " + message_3 + "\n";
			error = true;
		}
	}
}

function check_form(form_name) {
	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 = "Errors have occurred during the processing of your form.\n\nPlease make the following corrections:\n\n";

	check_radio("gender", "Please choose a salutation.");

	check_input("firstname", 2,
		"Your First Name must contain a minimum of 2 characters.");

	check_input("lastname", 2,
		"Your Last Name must contain a minimum of 2 characters.");

	check_input("dob", 10,
		"Your Date of Birth must be in this format: MM/DD/YYYY (eg 05/21/1970)");

	check_input("email_address", 6,
		"Your E-Mail Address must contain a minimum of 6 characters.");

	check_input("street_address", 5,
		"Your Street Address must contain a minimum of 5 characters.");

	check_input("postcode", 4,
		"Your Post Code must contain a minimum of 4 characters.");

	check_input("city", 3,
		"Your City must contain a minimum of 3 characters.");

	check_input("state", 2,
		"Your State must contain a minimum of 2 characters.");

	check_select("country", 2,
		"Your Country must contain a minimum of 2 characters.");

	check_input("telephone", 3,
		"Your Telephone Number must contain a minimum of 3 characters.");

	check_password("password", "confirmation", 5,
		"Your Password must contain a minimum of 5 characters.",
		"The Password Confirmation must match your Password.");
	check_password_new("password_current", "password_new", "password_confirmation", 5,
		"Your Password must contain a minimum of 5 characters.",
		"Your new Password must contain a minimum of 5 characters.",
		"The Password Confirmation must match your new Password.");

	if (error == true) {
		alert(error_message);
		return false;
	} else {
		submitted = true;
		return true;
	}
}