// 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.


//  jim adding check date
function checkDate(string,theField) {
	 var error="";
	  if (string.length == 0) {
	     error = theField + " has not been filled in.\n";
	  } else {
		    var _test = Date.parse(string);
		    if (isNaN(_test)) {
		        error = theField + " is not a valid date.\n";
		    }
	  }
   return error;
}


// 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, strng2) {
var error = "";
if (strng == "") {
   error = "You didn't enter a password.\n";
}

    var illegalChars = /[\W_]/; // allow only letters and numbers
    
    if ((strng.length < 6)) {
       error += "The password is the wrong length. It must be greater than 6 characters.\n";
    }
    else if (illegalChars.test(strng)) {
      error += "The password contains illegal characters. Only numbers and letters are allowed\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";
    //}

	if (strng != strng2){
		error += "The password and the verification do not match\n";
	}
	  
return error;    
}    

function checkMatch (strmg, strmg2) {
	var error = "";
	if (strmg == "") {
	   error = "You didn't enter a password.\n";
	}

	if (strmg != strmg2){
		error = "The password and the verification do not match\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,theField) {
var error = "";
  if (strng.length == 0) {
     error = theField + " 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(cv,theField) {
	var error = "";
	didChoose = false;
	for (i=0;i<cv.length;i++) {
		if (cv[i].checked) {
			didChoose = true;
		}
	}
   if (!(didChoose)) {
       error = "Please check a "+ theField + " radio button.\n";
    }
return error;
}

// valid selector from dropdown list

function checkDropdown(choice,theName) {
var error = "";
    if (choice == 0) {
    error = "You didn't choose an option from the "+theName+".\n";
    }    
return error;
}