// Copyright © 2002 by Apple Computer, Inc., All Rights Reserved.


// email

function checkEmail (strng) {
var error="";
if (strng == "") {
   error = "Please Enter Your 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 = "Please 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;    
}    

function checkFirstName (strng) {
var error = "";
if (strng == "") {
   error = "Please Enter A Name.\n";
}
return error;
}       

function checkLastName (strng) {
var error = "";
if (strng == "") {
   error = "Please Enter Your Last Name.\n";
}
return error;
}       

function checkUseraddress (strng) {
var error = "";
if (strng == "") {
   error = "Please Enter Your Address.\n";
}
return error;
}       

function checkUsercity (strng) {
var error = "";
if (strng == "") {
   error = "Please Enter Your City.\n";
}
return error;
}

function checkUserstate (strng) {
var error = "";
if (strng == "") {
   error = "Please Enter Your State.\n";
}
return error;
}

function checkStory (strng) {
var error = "";
if (strng == "") {
   error = "Please Enter Your Story.\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;	  
}

// 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 checkRadioA(checkvalueA) {
var error = "";
   if (!(checkvalueA)) {
       error = "Please Select A Payment Option.\n";
    }
return error;
}

function checkRadioB(checkvalueB) {
var error = "";
   if (!(checkvalueB)) {
       error = "Please Select Whether or Not You Will Need Shipping.\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;
}