// 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. Use only numbers.\n";
  
    }
    if (!(stripped.length == 10)) {
	error = "The phone number is the wrong length. Make sure you included an area code. \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 Name.\n";
}

    var illegalChars = /\W\W+/; // allow letters, numbers, and underscores
    if ((strng.length < 4) || (strng.length > 50)) {
       error = "The Name is the wrong length.\n";
    }
    else if (illegalChars.test(strng)) {
    error = "The Name contains illegal characters.\n";
    } 
return error;
}       


// valid selector from dropdown list

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

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