how can i prevent the jumping of browser to the top of page in following code?? can i use jquery in following code anywhere??

how can i prevent the jumping of browser to the top of page in following code?? can i use jquery in following code anywhere??

html >>
<form action="update.php" method="post" name="myForm">
<input type="text" name="term" placeholder="Enter MemberID here"/  >
 &nbsp; 
 <input type="submit" value="  search  " name=search class="button_samll round orange"  />
</form>

>>update.php

<?php


$con = mysql_connect('localhost','bank','1234'); 
if (!$con) { 
die('Could not connect to MySQL: ' . mysql_error()); 
} 
mysql_select_db("bank",$con);

if (isset($_POST['update'])) 
{

$updatequery="UPDATE customer SET customer_id='$_POST[customer_id]',rdate='$_POST[rdate]'  WHERE member_id ='$_POST[hidden]'";
mysql_query($updatequery,$con);

}

if(isset($_POST['search']))
{
$rem = $_POST['term'];  

$sql = "select * from customer where member_id like '$rem'";
$mydata = mysql_query($sql,$con);

echo "<center>";
echo '<table border=1 width="70%" border-spacing=0px;>
<tr>
<th>Member ID</th>
<th>FirstName</th>
<th>Mobile No.</th>
<th>Renewal Date</th>
</tr>';

while ($record = mysql_fetch_array($mydata))
{
echo "<form action=update.php method=post>";
echo "<tr>";
echo "<td>" . $record['member_id']  . " </td>";
echo "<td>" .  $record['firstname']  . " </td>";
//echo "<td>" . "<input type=text name=lastname value=" . $record['lastname']. " </td>";
echo "<td>" . "<input type=text name=customer_id value=" . $record['customer_id']. " </td>";
//echo "<td>" . "<input type=text name=city value=" . $record['city']  . " </td>";
//echo "<td>" . "<input type=text name=adate value=" . $record['adate']  . " </td>";
echo "<td>" . "<input type=text name=rdate value=" . $record['rdate']  . " </td>";
echo "<td>" . "<input type=hidden name=hidden value= " . $record['member_id']  . " </td>";
echo '<td>' . '<input type=submit name=update value=Update class="button_small green">' . ' </td>'; 
echo "</tr>";
echo "</form>";
}
echo "</table>";
echo "</center>";
echo '<p><br>
<hr><br>
<p><br>';
}
mysql_close($con);