function ProcessData(){
	CheckNameInput();
}

// Check for null and for empty
function isFilled(strVal){
	if (strVal.value == "" || strVal.value == null){
		return false;}
	else {return true;}
}

function CheckNameInput(){
	if (isFilled(document.dataform.name)==false){
		window.alert("Name is required.");
		document.dataform.name.focus();}
	else{
		CheckPhoneInput();
	}		
}

function CheckPhoneInput(){
	if (isFilled(document.dataform.phone)==false){
		window.alert("Phone number is required.");
		document.dataform.phone.focus();}
	else{
		CheckEmailInput();
	}		
}


function CheckEmailInput(){
	var strEmail=document.dataform.email.value;
	if (! isValidEmail(strEmail)){
		window.alert("Valid email is required.");
		document.dataform.email.focus();}
	else{
		CheckAddressInput();
	}		
}

function CheckAddressInput(){
	if (isFilled(document.dataform.address)==false){
		window.alert("Address is required.");
		document.dataform.address.focus();}
	else{
		CheckInquiryInput();
	}		
}


function CheckInquiryInput(){
	if (isFilled(document.dataform.comments)==false){
		window.alert("Message is required.");
		document.dataform.comments.focus();}
	else{
		document.dataform.submit();
	}		
}

function isValidEmail(email, required) {
    if (required==undefined) {   // if not specified, assume it's required
        required=true;
    }
    if (email==null) {
        if (required) {
            return false;
        }
        return true;
    }
    if (email.length==0) {  
        if (required) {
            return false;
        }
        return true;
    }
    if (! allValidChars(email)) {  // check to make sure all characters are valid
        return false;
    }
    if (email.indexOf("@") < 1) { //  must contain @, and it must not be the first character
        return false;
    } else if (email.lastIndexOf(".") <= email.indexOf("@")) {  // last dot must be after the @
        return false;
    } else if (email.indexOf("@") == email.length) {  // @ must not be the last character
        return false;
    } else if (email.indexOf("..") >=0) { // two periods in a row is not valid
	return false;
    } else if (email.indexOf(".") == email.length) {  // . must not be the last character
	return false;
    }
    return true;
}

function allValidChars(email) {
  var parsed = true;
  var validchars = "abcdefghijklmnopqrstuvwxyz0123456789@.-_";
  for (var i=0; i < email.length; i++) {
    var letter = email.charAt(i).toLowerCase();
    if (validchars.indexOf(letter) != -1)
      continue;
    parsed = false;
    break;
  }
  return parsed;
}