// 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";
}

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.\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;
}       

// name - at least 3 chars, uc, lc, and underscore only.

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


    var illegalChars = /\W''/; // allow letters, numbers, and underscores
    if ((strng.length < 2)) {
       error = "The name is the wrong length.\n";
    }
    else if (illegalChars.test(strng)) {
    error = "The name contains illegal characters.\n";
    } 
return error;
}       

// city - at least 3 chars, uc, lc, and underscore only.

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


    var illegalChars = /\W''/; // allow letters, numbers, and underscores
    if ((strng.length < 2)) {
       error = "The city is the wrong length.\n";
    }
    else if (illegalChars.test(strng)) {
    error = "The city contains illegal characters.\n";
    } 
return error;
}       

// state - is 2 chars, uc, lc, and underscore only.

function checkState (strng) {
var error = "";
if (strng == "") {
   error = "You didn't enter a state.\n";
}
    var illegalChars = /\W/; // allow letters, numbers, and underscores
    if ((strng.length != 2)) {
       error = "The state can only be 2 characters.\n";
    }
    else if (illegalChars.test(strng)) {
    error = "The state contains illegal characters.\n";
    } 
return error;
}    

// zip - 5-10 chars, uc, lc, and underscore only.

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


    var illegalChars = /\W/; // allow letters, numbers, and underscores
    if ((strng.length < 5) || (strng.length > 10)) {
       error = "The zip code is the wrong length.\n";
    }
    else if (illegalChars.test(strng)) {
    error = "The zip code contains illegal characters.\n";
    } 
return error;
} 

// add1 - at least 1 chars.

function checkAdd1 (strng) {
var error = "";
if (strng == "") {
   error = "You didn't enter a street address.\n";
}

return error;
}   
    
// subject - at least 1 chars.

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

return error;
}       

// message body - at least 1 chars.

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

return error;
}