I have devloped a contact form with PHP code. It work perfectly. when you submit the form all the information e-mail to you perfectly. After submitting the contact form it will take you back to you same contact page. Know want to make some changes in it. When some one submit the contact form a message appear "Thanks for contacting us we will reply you withing in 5 business days" and then return to you on contact page. I try to modify the code myself but can't able to do that.

PHP Code:
if(!$_POST) exit;
$email $_POST['email'];
//$error[] = preg_match('/\b[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\b/i', $_POST['email']) ? '' : 'INVALID EMAIL ADDRESS';
if(!eregi("^[a-z0-9]+([_\\.-][a-z0-9]+)*" ."@"."([a-z0-9]+([\.-][a-z0-9]+)*)+"."\\.[a-z]{2,}"."$",$email )){
$error.="Invalid email address entered";
$errors==1) echo $error;
$values = array ('URL','email','Keyword','Title');
$required = array('URL','email','Keyword','Title');
$your_email "info@bannistermarketinggroup.co.uk";    
$email_subject "Bannister Marketing Group: ".$_POST['subject'];
$email_content "Following is the keyword report:\n";
$values as $key => $value){
            if (
$key != 'subject' && $key != 'company') {
              if( empty(
$_POST[$value]) ) { echo 'PLEASE FILL IN REQUIRED FIELDS'; exit; }
$email_content .= $value.': '.$_POST[$value]."\n";
mail($your_email,$email_subject,$email_content)) {
//echo 'thanks you we receive report witing 24hr';
//else {
            //echo 'ERROR!';

HTML Code:
<form action="contact.php" method="post">
                    	<Div class="fieldbox">
                        	<div class="textname">URL:</div>
                            <div class="field"><input type="text" id="URL" name="URL" /></div>
                            <div class="******"><img src="images/URLicon.jpg" /></div>
                        <Div class="fieldbox">
                        	<div class="textname">Title:</div>
                            <div class="field"><input id="Title" type="text" name="Title" /></div>
                            <div class="******"><img src="images/titleicon.jpg" /></div>
                          <Div class="fieldbox">
                        	<div class="textname">Keyword:</div>
                            <div class="field"><input id="Keyword" type="text" name="Keyword" />  </div>
                            <div class="******"><img src="images/keywordicon.jpg" /></div>
                        <Div class="fieldbox">
                        	<div class="textname">E-mail:</div>
                            <div class="field"><input id="name" type="text" name="email" />  </div>
                            <div class="******"><img src="images/emailicon.jpg" /></div>
                        <div class="button">
                        <input type="image" type="text" src="images/submit.jpg" />	

Any once can help me please.Need to done it as soon as possible.