// Copyright © 2001 by Apple Computer, Inc., All Rights Reserved.
//
// You may incorporate this Apple sample code into your own code
// without restriction. This Apple sample code has been provided "AS IS"
// and the responsibility for its operation is yours. You may redistribute
// this code, but you are not permitted to redistribute it as
// "Apple sample code" after having made changes.

// email

function checkEmail (strng) {
	var error="";
	if (strng == "") {
		error = "You didn't enter an email address.\n";
	}

	var emailFilter=/^.+@.+\..{2,3}$/;
	if (!(emailFilter.test(strng))) { 
		error = "Please enter a valid Email address.\n";
	} else {
		//test email for illegal characters
		var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/
		if (strng.match(illegalChars)) {
			error = "The Email address contains illegal characters.\n";
		}
	}

	return error;    
}


// phone number - strip out delimiters and check for 10 digits

function checkPhone (strng) {
	var error = "";
	if (strng == "") {
//		error = "You didn't enter a phone number.\n";
		return error;
	}

	var stripped = strng.replace(/[\(\)\.\-\ ]/g, ''); //strip out acceptable non-numeric characters
	if (isNaN(parseInt(stripped))) {
		error = "The phone number contains illegal characters.";
	}
//	if (!(stripped.length == 10)) {
//		error = "The phone number is the wrong length. Make sure you included an area code or country prefix.\n";
//	} 

	return error;
}


// password - between 6-8 chars, uppercase, lowercase, and numeral

function checkPassword (strng) {
	var error = "";
	if (strng == "") {
		error = "You didn't enter a password.\n";
	}

	var illegalChars = /[\W_]/; // allow only letters and numbers
    
	if ((strng.length < 6) || (strng.length > 8)) {
		error = "The password is the wrong length.\n";
	} else if (illegalChars.test(strng)) {
		error = "The password contains illegal characters.\n";
	} else if (!((strng.search(/(a-z)+/)) && (strng.search(/(A-Z)+/)) && (strng.search(/(0-9)+/)))) {
		error = "The password must contain at least one uppercase letter, one lowercase letter, and one numeral.\n";
	}  

	return error;    
}    


// username - 4-10 chars, uc, lc, and underscore only.

function checkUsername (strng) {
	var error = "";
	if (strng == "") {
		error = "You didn't enter a username.\n";
	}

	var illegalChars = /\W/; // allow letters, numbers, and underscores
	if ((strng.length < 4) || (strng.length > 10)) {
		error = "The username is the wrong length.\n";
	} else if (illegalChars.test(strng)) {
		error = "The username contains illegal characters.\n";
	} 

	return error;
}       


// non-empty textbox

function isEmpty(strng) {
	var error = "";
	if (strng.length == 0) {
		error = "The mandatory text area has not been filled in.\n"
	}

	return error;	  
}

// non-empty first name

function checkFName(strng) {
	var error = "";
	if (strng.length == 0) {
		error = "Please enter a First Name (Given Name).\n"
	}

	return error;	  
}

// non-empty last name

function checkLName(strng) {
	var error = "";
	if (strng.length == 0) {
		error = "Please enter a Last Name (Surname).\n"
	}

	return error;	  
}
						   
// non-empty company name

function checkCompany(strng) {
	var error = "";
	if (strng.length == 0) {
		error = "Please enter a Company Name.\n"
	}

	return error;	  
}

// non-empty title

function checkTitle(strng) {
	var error = "";
	if (strng.length == 0) {
		error = "Please enter a Job Title.\n"
	}

	return error;	  
}

							
// was textbox altered

function isDifferent(strng) {
	var error = ""; 
	if (strng != "Can\'t touch this!") {
		error = "You altered the inviolate text area.\n";
	}

	return error;
}

// exactly one radio button is chosen

function checkRadio(checkvalue) {
	var error = "";
	if (!(checkvalue)) {
		error = "Please check a radio button.\n";
	}

	return error;
}

// valid selector from dropdown list

function checkDropdown(choice) {
	var error = "";
	if (choice == 0) {
		error = "You didn't choose an option from the drop-down list.\n";
	}    

	return error;
}