//=== CONTACT FORM ============================================================
function validateContactForm(theForm) {
var reason = "";

  reason += validateEmpty(theForm.name);
  reason += validateEmail(theForm.email);
  reason += validatePhone(theForm.phone);
      
  if (reason != "") {
    alert("Please Fill In All Required Fields.\nThe fields outlined in red were left blank.\n");
    return false;
  }

  return true;
}

//=== HOME FORM ============================================================
function validateHomeForm(theForm) {
var reason = "";

  reason += validateEmpty(theForm.name);
  reason += validateEmail(theForm.email);
  reason += validatePhone(theForm.phone);
      
  if (reason != "") {
    alert("Please Fill In All Required Fields.\nThe fields outlined in red were left blank.\n");
    return false;
  }

  return true;
}

//=== VALIDATE EMPTY FIELD ============================================================
function validateEmpty(fld) {
    var error = "";
 
    if (fld.value.length == 0) {
        fld.style.border = '2px solid #C00'; 
        error = "The required field has not been filled in.\n"
    } else {
        fld.style.border = '2px solid #888'; 
    }
    return error;  
}

//=== VALIDATE PHONE ============================================================
function validatePhone(fld) {
    var error = "";
    var stripped = fld.value.replace(/[\(\)\.\-\ ]/g, '');    

   if (fld.value == "") {
        error = "You didn't enter a phone number.\n";
       fld.style.border = '2px solid #C00'; 
    } else if (isNaN(parseInt(stripped))) {
        error = "The phone number contains illegal characters.\n";
       fld.style.border = '2px solid #C00'; 
    } else {
        fld.style.border = '2px solid #888'; 
    }
    return error;
}

//=== VALIDATE Zip Code============================================================
function validateZip(fld) {
    var error = "";
    var stripped = fld.value.replace(/[\(\)\.\-\ ]/g, '');    

   if (fld.value == "") {
        error = "You didn't enter a zip code.\n";
       fld.style.border = '2px solid #C00'; 
    } else if (isNaN(parseInt(stripped))) {
        error = "The zip code contains illegal characters.\n";
       fld.style.border = '2px solid #C00'; 
    } else {
        fld.style.border = '2px solid #888'; 
    }
    return error;
}

//=== VALIDATE EMAIL ============================================================
function trim(s)
{
  return s.replace(/^\s+|\s+$/, '');
}

function validateEmail(fld) {
    var error="";
    var tfld = trim(fld.value);                        // value of field with whitespace trimmed off
    var emailFilter = /^[^@]+@[^@.]+\.[^@]*\w\w$/ ;
    var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/ ;
   
    if (fld.value == "") {
       fld.style.border = '2px solid #C00'; 
        error = "You didn't enter an email address.\n";
    } else if (!emailFilter.test(tfld)) {              //test email for illegal characters
       fld.style.border = '2px solid #C00'; 
        error = "Please enter a valid email address.\n";
    } else if (fld.value.match(illegalChars)) {
       fld.style.border = '2px solid #C00'; 
        error = "The email address contains illegal characters.\n";
    } else {
        fld.style.border = '2px solid #888'; 
    }
    return error;
}

//=== VALIDATE USERNAME ============================================================
function validateUsername(fld) {
    var error = "";
    var illegalChars = /\W/; // allow letters, numbers, and underscores
 
    if (fld.value == "") {
       fld.style.border = '2px solid #C00';  
        error = "You didn't enter a username.\n";
    } else if ((fld.value.length < 5) || (fld.value.length > 15)) {
       fld.style.border = '2px solid #C00'; 
        error = "The username is the wrong length.\n";
    } else if (illegalChars.test(fld.value)) {
       fld.style.border = '2px solid #C00'; 
        error = "The username contains illegal characters.\n";
    } else {
        fld.style.border = '2px solid #888'; 
    }
    return error;
}

//=== VALIDATE PASSWORD ============================================================
function validatePassword(fld) {
    var error = "";
    var illegalChars = /[\W_]/; // allow only letters and numbers 
 
    if (fld.value == "") {
       fld.style.border = '2px solid #C00'; 
        error = "You didn't enter a password.\n";
    } else if ((fld.value.length < 7) || (fld.value.length > 15)) {
        error = "The password is the wrong length. \n";
       fld.style.border = '2px solid #C00'; 
    } else if (illegalChars.test(fld.value)) {
        error = "The password contains illegal characters.\n";
       fld.style.border = '2px solid #C00'; 
    } else if (!((fld.value.search(/(a-z)+/)) && (fld.value.search(/(0-9)+/)))) {
        error = "The password must contain at least one numeral.\n";
       fld.style.border = '2px solid #C00'; 
    } else {
        fld.style.border = '2px solid #888'; 
    }
   return error;
}