php分页不跳转 分页源代码 分页时上一页下一页不显示 但可以跳转

分页源代码，分页时上一页下一页不显示，但可以跳转

$sql="select * from product where pronum like'%$key%' or pdes like '%$key%'";

$page=$_REQUEST["page"];

$ss=mysql_query($sql,$conn);

$row1=mysql_fetch_array($ss);

$num=$row1[0];

if($num>0)

{

if (empty($_GET['page']))

{ $page=1;}

else

{$page=$_GET['page'];}

if($page<1)$page=1;

if($page>=ceil($num/5)) $page=ceil($num/5);

$sql1="select * from product where pronum like'%$key%' or pdes like '%$key%' limit ".($page*5).",5";

//echo $sql1;

$rest1=mysql_query($sql1,$conn);

?>

while($row=mysql_fetch_array($rest1))

{ ?>

<?php echo $row["pronum"]?><?php echo $row["pdes"]?>

{?>

firsPage

PrevPage

}

else

{?>

firsPage

PrevPage

} ?>

{ ?> nextPage

LastPage

else

{ ?> nextPage

LastPage

}

else

{echo"";

} ?>

_uacct = "UA-1708392-2";

urchinTracker();