hi   check this code :  
<?php
define('HOST_NAME', 'localhost');
define('USERNAME', 'deadmann_*******');
define('PASSWORD', '*******************');
define('DATABASE', 'deadmann_**********');
if(isset ($_COOKIE['MRLFeedbackPassed']) )
{
 echo'<html><head></head>'
  .'<body bgcolor="black"><font color="white">'
  .'<H1>Multi-realm Launcher</H1></font></body></html>';
}
else
{
 session_start();
 if(isset ($_SESSION['mrl_feedback']) && ($_SESSION['mrl_feedback']!=''))
 {
  if (!empty($_POST['msg']) && (strlen($_POST['msg'])>5) )
  {
if(! $link = mysql_connect(HOST_NAME, USERNAME, PASSWORD))
{
 die('<html><head></head>'
  .'<body bgcolor="black"><font color="white">Cannot connect to '
  .'server.</font></body></html>');
 exit;
}
 
if(! mysql_select_db(DATABASE,$link))
{
 die('<html><head></head>'
  .'<body bgcolor="black"><font color="white">Cannot connect to '
  .'database.</font></body></html>');
 exit;
}
mysql_query('insert into `mrl_feedback` (`name`,`email`,`message`) values('
  .'"'.mysql_real_escape_string($_POST['name'],$link).'"'
  .',"'.mysql_real_escape_string($_POST['email'],$link).'"'
  .',"'.mysql_real_escape_string($_POST['msg'],$link).'"'
  , $link);
 mysql_close($link);
setcookie('MRLFeedbackPassed','is set',time()+60*60*24*365,'/','deadmann.heliohost.org',TRUE);
echo '<html><head></head>'
  .'<body bgcolor="black"><font color="white">Your feed back '
  .'has been send successfully.</font></body></html>';
  }
  else
  {
if( (!isset ($_POST['msg'])) || (empty ($_POST['msg'])))
{
 header("Location: feedback.php?error=1");
 $_SESSION['mrl_feedback']='';
 exit;
}
else if(isset ($_POST['msg']) && (strlen($_POST['msg'])<=5))
{
 header("Location: feedback.php?error=2");
 $_SESSION['mrl_feedback']='';
 exit;
}
  }
 }
 else
 {
?>
<html>
<head></head>
<body bgcolor="black">
 <form action="<?php echo $GLOBALS['PHP_SELF']?>" method="post">
  <table>
<tr>
 <td><font color="white">Name:</font></td>
 <td><input type="text" name="name"/></td>
 <td rowspan="2">
  <?php
if(isset ($_GET['error'])) {
	  if($_GET['error']==1){
	   echo '<font color="red">*You must fill<br/> message field.</font>';
	  }
	  else if($_GET['error']==2){
	   echo '<font color="red">*Message<br/> length is<br/> too low.</font>';
	  }
	  else
	  {
	   echo '<font color="green">Feedback</font>';
	  }
	 }
	 else
	 {
	  echo '<font color="green">Feedback</font>';
	 }
	?>
</td>
</tr>
<tr>
 <td><font color="white">Email:</font></td>
 <td><input type="text" name="email"/></td>
 <td></td>
</tr>
<tr>
 <td><font color="white">Message:</font></td>
 <td><input type="text" name="msg"/></td>
 <td><input type="submit" value="Send"/></td>
</tr>
  </table>
 </form>
</body>
</html>
<?php
  $_SESSION['mrl_feedback']='is set';
 }
}
?>