// 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 and also allows room for extra values like 
// extension numbers.
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";

    }
    if (!(stripped.length > 9)) {
	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;
}

// 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;
}

// Validate the zip code
function isZipCode(val,fieldname) {
	var re = /[\d]{5}$/;
	return val.match(re) ? "" : fieldname + " is not valid.\n"; 
}

// Validate an integer	
function isInteger(val,fieldname) {
var objRegExp  = /(^-?\d\d*$)/;
  return objRegExp.test(val)? "" : fieldname + " is not valid.\n"; 

}

// Put focus on a form element with the given id attribute value
function focusElement(elem_id) {
	var elem = document.getElementById(elem_id);
	elem.focus();
	if (elem.select != null) {
		elem.select();
	}
}

// non-empty textbox
function isEmpty(strng,fieldname) {
var error = "";
  if (strng.length == 0) {
     error = fieldname + " 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;
}

function isChecked(fieldname) {
var error = "";
	if (fieldname.checked == false) {
	     error = "You must accept the terms of the form.\n";
	}
return error;
}



// at least one checked box in group of boxes
function isCheckedGroup(formname,strFieldnameList,groupname) {
var error = groupname + " You must check at least one box in the group of checkboxes.\n";
   // loop through all formfields
   for (i=0;i<document.forms[formname].elements.length;i++) { 
	fieldname = document.forms[formname].elements[i].name;
	// match current fieldname with list of fieldnames that are
    // passed to function and if checked null out error message & break
	if (strFieldnameList.indexOf(fieldname) != -1) {
		if (document.forms[formname].elements[i].checked == true) {
	     error = "";
	     break;
		 }
	}
   }
return error;
}

function isCheckedGroup(formname,strFieldnameList,groupname) {
var error = groupname + " You must check at least one box in the group of checkboxes.\n";
   // loop through all formfields
   for (i=0;i<document.forms[formname].elements.length;i++) { 
	fieldname = document.forms[formname].elements[i].name;
	// match current fieldname with list of fieldnames that are
    // passed to function and if checked null out error message & break
	if (strFieldnameList.indexOf(fieldname) != -1) {
		if (document.forms[formname].elements[i].checked == true) {
	     error = "";
	     break;
		 }
	}
   }
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;
}

//   1 if date1 is greater than date2
//   0 if date2 is greater than date1 of if they are the same
//  -1 if either of the dates is in an invalid format
function checkDates(d1,d2) {
   out = compareDates(d1,"M/dd/y",d2,"M/dd/y");
  var error = ""; 
   if (out == 1) {
   	error = "Start Date cannot be greater than or equal to the End Date.\n";   }
   if (out == -1) {
   	error = "Date Format is Invalid.\n";
   }

return error;
}



d = new Date();
year = d.getFullYear();
//-->