// 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

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;
}





// INDIVIDUAL EMPTY FORM CHECKER


function isEmptyName(strng) {
var error = "";
  if (strng.length == 0) {
     error = "Your Name.\n"
  }
return error;     
}

function isEmptyTitle(strng) {
var error = "";
  if (strng.length == 0) {
     error = "Your Title.\n"
  }
return error;     
}

function isEmptyDepartment(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The name of your department.\n"
  }
return error;     
}

function isEmptyCollege(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The name of your college.\n"
  }
return error;     
}

function isEmptyResearch(strng) {
var error = "";
  if (strng.length == 0) {
     error = "A description of your primary research.\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;
}