function validateFormOnSubmit(theForm) {
var reason = "";

  reason += validatefirstname(theForm.firstname);
  reason += validatelastname(theForm.lastname);
  reason += validatephone(theForm.phone);
  reason += validateemail(theForm.email);
      
  if (reason != "") {
    alert("Oops! You forgot something:\n" + reason);
    return false;
  }

  return true;
}


function validateEmpty(fld) {
    var error = "";
 
    if (fld.value.length == 0) {
        fld.style.background = 'Yellow'; 
        error = "The required field has not been filled in.\n"
    } else {
        fld.style.background = 'White';
    }
    return error;  
}


function validatefirstname(fld) {
    var error = "";
    var illegalChars = /\W/; // allow letters, numbers, and underscores
 
    if (fld.value == "") {
        fld.style.background = 'Yellow'; 
        error = "Please enter your first name.\n";
    } else if ((fld.value.length < 2) || (fld.value.length > 25)) {
        fld.style.background = 'Yellow'; 
        error = "Please enter between 2 and 25 characters for your name.\n";
    } else if (illegalChars.test(fld.value)) {
        fld.style.background = 'Yellow'; 
        error = "The name contains illegal characters.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}

function validatelastname(fld) {
    var error = "";
    var illegalChars = /\W/; // allow letters, numbers, and underscores
 
    if (fld.value == "") {
        fld.style.background = 'Yellow'; 
        error = "Please enter your last name.\n";
    } else if ((fld.value.length < 2) || (fld.value.length > 25)) {
        fld.style.background = 'Yellow'; 
        error = "Please enter between 2 and 25 characters for your name.\n";
    } else if (illegalChars.test(fld.value)) {
        fld.style.background = 'Yellow'; 
        error = "The name contains illegal characters.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}

function validatephone(fld) {
    var error = "";
    var illegalChars = /\W/; // allow letters, numbers, and underscores
 
    if (fld.value == "") {
        fld.style.background = 'Yellow'; 
        error = "Please enter your phone number.\n";
    } else if ((fld.value.length < 2) || (fld.value.length > 25)) {
        fld.style.background = 'Yellow'; 
        error = "Please enter between 2 and 25 characters for phone.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}


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.background = 'Yellow';
        error = "Please enter your email address.\n";
    } else if (!emailFilter.test(tfld)) {              //test email for illegal characters
        fld.style.background = 'Yellow';
        error = "That's not a real email address silly! Please enter a valid email address.\n";
    } else if (fld.value.match(illegalChars)) {
        fld.style.background = 'Yellow';
        error = "That's not a real email address silly! Please enter a valid email address.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}


/***********************************************
Checks email field to make sure it's a valid email address.


function checkEmail(myForm) {
if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(myForm.FieldData1.value)){
return (true)
}
alert("Please enter a valid email address.")
return (false)
}


/***********************************************
Checks name field to make sure it has something in it.
***********************************************/