// Variables

var email_max_allowed = '500';

var email_verify = '';

var email_p = 0;

var email_pageid = 0;

var email_yourEMAIL = '';

var email_message = '';

var email_friendEMAIL = '';

var email_friendEMAILS = '';


// Email Form Validation

function validate_email_form() {


	if(document.getElementById('yourEMAIL')) {

		email_yourEMAIL = document.getElementById('yourEMAIL').value;

	}

	if(document.getElementById('message')) {

		email_message = document.getElementById('message').value;

	}



	email_friendEMAIL = document.getElementById('friendEMAIL').value;

	email_friendEMAILS = email_friendEMAIL.split(",");


	// Variables

	var errFlag = false;

	var errMsg = "The Following Error(s) Occured:\n";	

	errMsg = errMsg + "__________________________________\n\n";




	// Your Email Validation

	if(document.getElementById('yourEMAIL')) {

		if(isEmpty(email_yourEMAIL)) {

			errMsg = errMsg + "- Your Email is empty\n";

			errFlag = true;

		}

		if(!is_valid_email(email_yourEMAIL)) {

			errMsg = errMsg + "- Your Email is invalid\n";

			errFlag = true;

		}

	}

	// Your Remarks Validation

	if(document.getElementById('message')) {

		if(!isEmpty(email_message)) {

			if(!is_valid_remarks(email_message)) {

				errMsg = errMsg + "- Your Message content is invalid\n";

				errFlag = true;

			}

		}

	}


	// Friend Email(s) Validation

	if(isEmpty(email_friendEMAIL)) {

		errMsg = errMsg + "- Friend Email(s) is empty\n";

		errFlag = true;

	} else {

		for(i = 0; i < email_friendEMAILS.length; i++) {

			if(isEmpty(email_friendEMAILS[i])) {

				errMsg = errMsg + "- Friend Email is empty: " + email_friendEMAILS[i] + "\n";

				errFlag = true;

			}

			if(!is_valid_email(email_friendEMAILS[i])) {

				errMsg = errMsg + "- Friend Emails must use commas to seperate \n(e.g a1@email.com, a2@email.com): " + email_friendEMAILS[i] + "\n";

				errFlag = true;

			}

		}

	}

	if(email_friendEMAILS.length > email_max_allowed) {

		errMsg = errMsg + "- Maximum 10 Friend Email(s) allowed\n";

		errFlag = true;

	}

	// If There Is Error Alert It

	if (errFlag == true){

		alert(errMsg);

		return false;

	} else {

		return true;

	}

}



// Check Form Field Is Empty

function isEmpty(value){

	if (trim(value) == "") {

		return true;

	}

	return false;

}



// Trim White Spaces

function trim(strText) { 

	// this will get rid of leading spaces 

	while (strText.substring(0,1) == ' ') 

		strText = strText.substring(1, strText.length);

	// this will get rid of trailing spaces 

	while (strText.substring(strText.length-1,strText.length) == ' ')

		strText = strText.substring(0, strText.length-1);

   return strText;

}



// Check Name

function is_valid_name(name) {

	var name = trim(name);

	var filter  = /[(\*\(\)\[\]\+\,\/\?\:\;\'\"\`\~\\#\$\%\^\&\<\>)+]/;

	return !filter.test(name);

}


// Check Email

function is_valid_email(email) {

	var email = trim(email);

	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;

	return filter.test(email);

}


// Check Remarks

function is_valid_remarks(remarks) {

	var remarks = trim(remarks);

	var injection_strings = new Array('apparently-to', 'cc', 'bcc', 'boundary', 'charset', 'content-disposition', 'content-type', 'content-transfer-encoding', 'errors-to', 'in-reply-to', 'message-id', 'mime-version', 'multipart/mixed', 'multipart/alternative', 'multipart/related', 'reply-to', 'x-mailer', 'x-sender', 'x-uidl');

	for(i = 0; i < injection_strings.length; i++) {

		if(remarks.indexOf(injection_strings[i]) != -1) {

			return false;

		}

	}

	return true;
}