// 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.
// Edited by: Curtis Knapp

// contact form

function checkContactForm(theForm) {
    var why = "";

    why += checkDropdown(theForm.contact.selectedIndex);
    why += checkEmail(theForm.email.value);
    why += isEmpty(theForm.message.value);
	
	  alert('contact ' + why);
	
    if (why != "") {
       alert(why);
       return false;
    }

return true;
}

// email

function checkEmail (strng) {
	//test for empty email
	if (strng == "") {
	   return "You didn't enter an email address.\n";
	}

	//test email for proper format
    var emailFilter=/^.+@.+\..{2,3}$/;
    if (!(emailFilter.test(strng))) { 
       return "Please enter a valid email address.\n";
    }

	//test email for illegal characters
    var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/
    if (strng.match(illegalChars)) {
       return "The email address contains illegal characters.\n";
    }

	return "";    
}


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

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

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

	return "";
}


// 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;	  
}

// 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 sendaddr = "";
    if (choice == 0) 
	{
    	sendaddr = "You didn't choose an option from the drop-down list.\n";
    }  
	else
	{	
		sendaddr = choice.value;
	}
return sendaddr;
}