// 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=/^.+@.+\..{2,4}$/;
    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.\n";
  
    }
return error;
}

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

var stripped = strng.replace(/[\(\)\.\-\ ]/g, ''); //strip out acceptable non-numeric characters
    if (isNaN(parseInt(stripped))) {
       error = "The mobile phone number contains illegal characters.\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 isEmptyDate(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The Date field has not been filled in.\n"
  }
return error;	  
}
function isEmptyName(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The Name field has not been filled in.\n"
  }
return error;	  
}
function isEmptySurname(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The Surname field has not been filled in.\n"
  }
return error;	  
}
function isEmptyJobTitle(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The JobTitle field has not been filled in.\n"
  }
return error;	  
}
function isEmptyTitle(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The Title field has not been filled in.\n"
  }
return error;	  
}
function isEmptyOccupation(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The Occupation field has not been filled in.\n"
  }
return error;	  
}
function isEmptyAddress(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The Address field has not been filled in.\n"
  }
return error;	  
}
function isEmptyAddress1(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The Address 1 field has not been filled in.\n"
  }
return error;	  
}
function isEmptyAddress2(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The Address 2 field has not been filled in.\n"
  }
return error;	  
}
function isEmptyCompany(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The Company field has not been filled in.\n"
  }
return error;	  
}
function isEmptyTown(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The Town field has not been filled in.\n"
  }
return error;	  
}
function isEmptyCity(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The City field has not been filled in.\n"
  }
return error;	  
}
function isEmptyCounty(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The County field has not been filled in.\n"
  }
return error;	  
}
function isEmptyPostCode(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The Post Code field has not been filled in.\n"
  }
return error;	  
}
function isEmptyHttp(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The Web Site URL field has not been filled in.\n"
  }
return error;	  
}
function isEmptySector(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The Industry Sector field has not been filled in.\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;
}