var color = '#F7CDE1';

function verifyRequired() {
	var reason = "";
	var contactform = document.getElementById('contactform');

  reason += validateName(contactform.uname);
	reason += validateSubject(contactform.usubject);
	reason += validatePhone(contactform.uphone);
	reason += validateEmail(contactform.uemail);
	reason += validateMessage(contactform.umessage);
      
  if (reason != "") {
    alert("Some fields need correction:\n" + reason);
    return false;
  }

  return true;
}

function validateName(fld) {
    var error = "";
    var illegalChars = /\W /; // allow letters, numbers, and underscores and spaces
 
    if (fld.value == "") {
        fld.style.background = color; 
        error = "You didn't enter a name.\n";
    } else if ((fld.value.length < 2) || (fld.value.length > 100)) {
        fld.style.background = color; 
        error = "The name is the wrong length.\n";
    } else if (illegalChars.test(fld.value)) {
        fld.style.background = color; 
        error = "The name contains illegal characters.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}

function validateSubject(fld) {
	var error = "";
	var illegalChars = /\W /; // allow letters, numbers, and underscores and spaces

	if (fld.value == "") {
			fld.style.background = color; 
			error = "You didn't enter a subject.\n";
	} else if ((fld.value.length < 2) || (fld.value.length > 100)) {
			fld.style.background = color; 
			error = "The subject is the wrong length.\n";
	} else if (illegalChars.test(fld.value)) {
			fld.style.background = color; 
			error = "The subject contains illegal characters.\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 = color;
        error = "You didn't enter an email address.\n";
    } else if (!emailFilter.test(tfld)) {              //test email for illegal characters
        fld.style.background = color;
        error = "Please enter a valid email address.\n";
    } else if (fld.value.match(illegalChars)) {
        fld.style.background = color;
        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, '');
		var illegalChars = /[^0-9]/ ;

   if (fld.value == "") {
        error = "You didn't enter a phone number.\n";
        fld.style.background = color;
    } else if (stripped.match(illegalChars)) {
        error = "The phone number contains illegal characters.\n";
        fld.style.background = color;
    } else if (!(stripped.length == 10)) {
        error = "The phone number is the wrong length. Make sure you included an area code.\n";
        fld.style.background = color;
    } else {
			fld.style.background = 'White';
		}
    return error;
}

function validateMessage(fld) {
    var error = "";
    //var illegalChars = /\W /; // allow letters, numbers, and underscores and spaces
 
    if (fld.value == "") {
        fld.style.background = color; 
        error = "You didn't enter a message.\n";
    } else if ((fld.value.length < 2) || (fld.value.length > 1024)) {
        fld.style.background = color; 
        error = "The message is the wrong length.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}