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

  reason += validateFirstname(theForm.firstname);
  reason += validateEmail(theForm.email);
  reason += validatePhone(theForm.phone);
  reason += validateComments(theForm.comments);
  reason += validatePhrase(theForm.phrase);
      
  if (reason != "") {
    alert("Some fields need correction:\n" + reason);
    return false;
  }

  else
  return true;
}
function validateComments(fld) {
    var error = "";
 
    if (fld.value.length == 0) {
        fld.style.background = '#a3eaff'; 
        error = "The required field has not been filled in.\n"
    } 
		else if (fld.value == "Type your enquiry...") {
        fld.style.background = '#a3eaff';
        error = "Please type your enquiry.\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 = '#a3eaff'; 
        error = "Please enter your Full Name.\n";
    } 	
	else if (fld.value == "Full Name") {
        fld.style.background = '#a3eaff';
        error = "You didn't enter your Full Name.\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 = '#a3eaff';
        error = "You didn't enter an email address.\n";
    } else if (!emailFilter.test(tfld)) {              //test email for illegal characters
        fld.style.background = '#a3eaff';
        error = "Please enter a valid email address.\n";
    } else if (fld.value.match(illegalChars)) {
        fld.style.background = '#a3eaff';
        error = "The email address contains illegal characters.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}
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.background = '#a3eaff';
    } else if (isNaN(parseInt(stripped))) {
        error = "The phone number contains illegal characters.\n";
        fld.style.background = '#a3eaff';
    } 
    return error;
}

function validatePhrase(fld) {
    var error = "";
    var illegalChars = /\W/; // allow letters, numbers, and underscores
 
    if (fld.value == "") {
        fld.style.background = '#a3eaff'; 
        error = "Please enter the captcha phrase.\n";
    } 	
	else {
        fld.style.background = 'White';
    }
    return error;
}