$.ajax({
    type: "GET",
    url: "action.php",
data: { status: "<?php echo $_GET['pid'];?>" }
    })

<?php
include('db.php');
if(isset($_GET['status']))
{
$status1=$_GET['status'];
$select=mysql_query("select * from product where product_id='$status1'");
while($row=mysql_fetch_object($select))
{
$status_var=$row->status;
if($status_var=='0')
{
$status_state=1;
}
else
{
$status_state=0;
}
$update=mysql_query("update product set status='$status_state' where product_id='$status1' ");
if($update)
{
header("Location: pagination.php");
}
else
{
echo mysql_error();
}
}
?>
<?php
}
?>

header("Location: pagination.php");

header("Location: pagination.php".($_GET['page'] ? '?page='.$_GET['page']:''));