[move next record in php]

sir i m new in php i need some help i want to go next record by clicking subbmit button

here is my code:

 

 

<?php

mysql_connect('localhost','root','');

mysql_select_db('exam');

$sql="select * from examination";

$result=mysql_query($sql);

echo $result;

echo"<table><tr>";

 

$i = 1;

while ($row = mysql_fetch_assoc($result))

{

if(isset($_POST['bttn']))

{

  // here i want to go next record

    echo "<td>";

    echo $row['qid'];

    echo "</td>";

        print "</tr>";

   

 

    $i++;

}

 

}

 

Please help me