Next and Previous Buttons

NEXT AND PREVIOUS BUTTONS

<?php
if(isset($_REQUEST['ind']))
 $sind = $_REQUEST['ind'];
else
 $sind = 0;
$totrec = 5;
mysql_connect("localhost","root","");
mysql_select_db("information_schema");
$data = mysql_query("select * from character_sets limit $sind, $totrec");
while($rec=mysql_fetch_row($data)){
 echo "<tr><td>$rec[0]<td>$rec[1]<td>$rec[2]";
}
echo "</table>";
if($sind!=0){
 $pind = $sind - $totrec;
 echo "<a href='demo.php?ind=$pind'>Previous</a>";
}
$nind = $sind + $totrec;
echo "<a href='demo.php?ind=$nind'>Next</a>";

//to stop display next button on last page
$data1 = mysql_query("select * from character_sets");
$trec = mysql_num_rows($data1);
if($nind < $trec){
 echo "next";
}
?>