Website Review and Suggestions

<form name="contact" action="<?= $_SERVER['PHP_SELF']; ?>?action=send" method="post" onSubmit="return chcekContact();">
   <input type="hidden" name="remoteAddr" value="<?php echo $_SERVER['REMOTE_ADDR'];?>" />

<div id="qhead">

<h3>Quick Enquiry</h3>

</div>

<div id="qbody">

<?  $err = false;
	  $mailed= false;
require_once('recaptcha/recaptchalib.php');

// Get a key from https://www.google.com/recaptcha/admin/create
$publickey = "6LeqSckSAAAAACN8H8A7-MbxBwzjar-vyAf-5mJW";
$privatekey = "removed";

# the response from reCAPTCHA
$resp = null;
# the error code from reCAPTCHA, if any
$error = null;

if (isset($_REQUEST['action']) && ($_REQUEST['action'] == 'send')) {
  include("securimage/securimage.php");
  $img = new Securimage();
  $valid = $img->check($_POST['captcha_code']);
  	if($valid)	$mailed = true;
	else	$error = '<font color="red">Incorrect</font>';


/*
if ($_POST["recaptcha_response_field"]) {
        $resp = recaptcha_check_answer ($privatekey,
                                        $_SERVER["REMOTE_ADDR"],
                                        $_POST["recaptcha_challenge_field"],
                                        $_POST["recaptcha_response_field"]);
    if ($resp->is_valid) {
*/										
    if ($mailed) {
	// Your code here to handle a successful verification
	$admin_email = 'email';
//	$admin_email = 'email';
	$Area = $_REQUEST['Area'];
	$Name = $_REQUEST['Name'];
	$ContactNo = $_REQUEST['ContactNo'];
	$Email = $_REQUEST['Email'];
	$Enquiry = $_REQUEST['Enquiry'];
	$remoteAddr = $_REQUEST['remoteAddr'];

	$email_subject = 'Website Enquiry ';

$mail_message = 'You have recieved the following enquiry from the website

From: '. $remoteAddr .'

Area: '. $Area .'

Name: '. $Name .'

Email: '. $Email.'

Phone Number: '. $ContactNo.'

Enquiry:

 '. $Enquiry .'';
      
 			require('phpmailer/class.phpmailer.php');
			$mail = new PHPMailer();
			$mail->From     = $_REQUEST['Email'];
			$mail->AddAddress($admin_email);
			$mail->Subject = $email_subject;
			$mail->Body    = $mail_message;
			$mail->Send();
$headers  = "MIME-Version: 1.0\r\n";
$headers .= "Content-type: text/html; charset=iso-8859-1\r\n";
$headers .= "From: ".$Email."\r\n";

//if(mail($admin_email,$email_subject,$mail_message,$headers))
	  $mailed= true ;

	 
	} else {
	// What happens when the CAPTCHA was entered incorrectly
	 $err = true;
//	 $error = $resp->error;
//	die ("The reCAPTCHA wasn't entered correctly. Go back and try it again." .		 "(reCAPTCHA said: " . $resp->error . ")");
		}
	  }

	    if ($mailed) {?>

   <p>Your Message has <br />been sent <br />successfully </p>
 
  <? 		}
				else

		{
		  ?>
<?php
	    if ($err) {?>
  <p><?php //echo $error;?></p>
  <? 
	}
?>  

<p>Name</p>

<input name="Name" type="text" class="text_field">

<div class="clear"></div>

<p>Email</p>

<input name="Email" type="text" class="text_field">

<div class="clear"></div>

<p>Phone</p>

<input name="ContactNo" type="text" class="text_field">

<div class="clear"></div>

<p>Post Code</p>

<input name="Area" type="text" class="text_field2">

<div class="clear"></div>

<p>Enqiry</p>

<textarea name="Enquiry" cols="" rows="" class="text_area"></textarea>

<div class="clear"></div>

<?php //          echo recaptcha_get_html($publickey);        ?>
	
<p>Security Check <?php echo $error?></p>

<br />

<br />

<br />
 
<input type="text" name="captcha_code" size="20" maxlength="6" class="text_field2"/>
		<img id="captcha" class="border" src="./securimage/securimage_show.php" alt="CAPTCHA Image" />

<a href="#" onclick="document.getElementById('captcha').src = './securimage/securimage_show.php?' + Math.random(); return false"><img class="border" src="./securimage/images/refresh.jpg" border="0"></a>

<div class="clear"></div>

<br />

<div class="clear"></div>

<input class="button" type="submit" name="submit" value="submit">
  
  <? }?>
  
	</form>
<script language="javascript">
function chcekContact(){
	var frm = document.contact;
	var err = false;
	var msg = "The following fields are required\n";
	if (frm.Name.value == "") {	
		err = true;
		msg += "* Full Name\n";
	}
	if (frm.Email.value == "") {	
		err = true;
		msg += "* Email\n";
	}else if (!echeck(frm.Email.value)) {	
		err = true;
		hed = "Error";
		msg += "* Invalid Email\n";
	}
/*	if (frm.ContactNo.value == "") {	
		err = true;
		msg += "* Phone Number\n";
	}
*/			
	if (frm.Enquiry.value == "") {	
		err = true;
		msg += "* Your Enquiry\n";
	}
	if (frm.captcha_code.value == "" ) {	
		err = true;
		msg += "* Security Check\n";
	}else if (frm.captcha_code.value.length < 4) {	
		err = true;
		msg += "* Security code must be 4 character.\n";
	}
	if (err == true){
		alert(msg);
		return false;
	} else {
		return true;
	}
}
function echeck(str) {
  var at="@"
  var dot="."
  var lat=str.indexOf(at)
  var lstr=str.length
  var ldot=str.indexOf(dot)
  if (str.indexOf(at)==-1){
     return false
  }
  if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
     return false
  }
  if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
       return false
  }
   if (str.indexOf(at,(lat+1))!=-1){
       return false
   }
   if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
       return false
   }
   if (str.indexOf(dot,(lat+2))==-1){
       return false
   }
   if (str.indexOf(" ")!=-1){
       return false
   }
   return true          
}

</script>