在按钮单击上设置分页

I need some help regarding pagination, the problem is that I want to show my database records first time on button click with pagination but every time I click on pagination link it requires click on button Here is my code I know I am making some mistake please check and kindly do me a favor by correcting my mistake ..

if (isset($_POST["search"])){        
$result=mysql_query("select count(*) from reg_phone");
$row=mysql_fetch_row($result);
$tr=$row[0];
$rpp=4;
$pn=1;
if(isset($_GET['pn']))
{
$pn=$_GET['pn'];
}
$tp=($tr/$rpp);
if($tr/$rpp>=0)
{
    $tp++;
}
$from=(($pn-1)*$rpp)+1;
$to=($pn)*($rpp);       
$show = "SELECT * FROM reg_phone where Id between $from and $to";
$rs = mysql_query($show) or die(mysql_error());
#****results in Grid****
echo "<table width='100%' border='1' cellpadding='2' border-color='#000' id='tbl'>";
echo "<tr>";
echo "<td style='background: white;'><b>IMEI #</td>";
echo "<td style='background: white;'><b>Phone #</td>";
echo "<td style='background: white;'><b>From Date</td>";
echo "<td style='background: white;'><b>Status</td>";
echo "</tr>";
$rowID = 1;
while ($row = mysql_fetch_array($rs)) {
echo "<tr>";
echo "<td id='imeinum" . $rowID . "'>$row[imei]</td>";
echo "<td id='phnum" . $rowID . "'>$row[phonenum]</td>";
echo "<td id='datepicker" . $rowID . "'>$row[fdate]</td>";
echo "<td id='rad" . $rowID . "'>$row[status]</td>";
echo "</tr>";
            $rowID++;
        }
        echo "</table>";
        echo "<ul id='pages'>";
        for($i=1;$i<=$tp;$i++)
        {
        echo "<li><a href='phonereg.php?pn=$i'>$i</a></li>";
        }
        echo "</ul>";
        #**********************
        mysql_free_result($rs);
        }

http://www.hscripts.com/scripts/jquery/pagination.php

the script here is really helpful to me. Exactly what i want to do. hope anyone one in future will need this. thanks all for suggestions. Regards. BKay