Description:
------------
Hi.this is  mahesh. i worte a scrit for retriving records with next,previous buttons and pagenumbers.But when i press next or pagenumbers like 1,2 that will not display next regarding records.i have 30 records and i displaying initially 10 records.next 10 records are not displaying when i press next.please help me.

Reproduce code:
---------------
if (!isset($screen))
  $screen = 0;
$start = $screen * $rows_per_page;
$sql = "SELECT name FROM student_adv ";
$sql .= "LIMIT $start, $rows_per_page";
$result = mysql_query($sql) or die(mysql_error());
$rows = mysql_num_rows($result);
//echo $rows;
for ($i = 0; $i < $rows; $i++) {
  $description = mysql_result($result, $i, 0);
  echo "$description<br>\n";
}
echo "<p><hr></p>\n";
// let's create the dynamic links now
if ($screen > 0) {
  $url = "search1.php?screen=" . $screen - 1;
  echo "<a href=\"$url\">Previous</a>\n";
}
// page numbering links now
for ($i = 0; $i < $pages; $i++) {
  $url = "search1.php?screen=" . $i;
  echo " | <a href=\"$url\">$i</a> | ";
}
if ($screen < $pages) {
  $url = "search1.php?screen=" . $screen + 1;
  echo "<a href=\"$url\">Next</a>\n";
}

Expected result:
----------------
show next 10 records when  i press next link.

Actual result:
--------------
The requested URL /mahesh/1 was not found on this server.