fail to manage checkbox using Pagination php using cookies - php

Question

I want to manage pagination by using cookies.
I need to get values from selected checkboxe's and pass that values through pagination witch is done by php/mysql. And if on another page user select other checkboxes add their values to array of earlier seleced. For that i wrote one code but it did not work..What wrong with my code????
Following file is the manual.php file.
<script type="text/javascript" src="paginate.js"> </script>
<tr>
<td><strong>Select</strong></td>
<td width="59"><strong>Sr No.</strong></td>
<td width="300"><strong>Question </strong></td>
<td width="30"><strong>CorrectAnswer </strong></td>
<td width="50"><strong>Catagory </strong></td>
<td><strong>View Details</strong></td>
</tr>
<?php
include("config.php");
$start = 0;
$per_page = 10;
//$tablename = "testlist";
$targetpage = "manual.php?id=42";
if(!isset($_GET['page'])){
$page = 1;
} else{
$page = $_GET['page'];
}
if($page<=1)
$start = 0;
else
$start = $page * $per_page - $per_page;
$sql="select * from math order by id";
$num_rows = mysql_num_rows(mysql_query($sql));
$num_pages = $num_rows / $per_page;
$sql .= " LIMIT $start, $per_page";
$result=mysql_query($sql) or die(mysql_error());
while($row=mysql_fetch_array($result))
{ ?>
<tr>
<td><input name="<?php echo $row['id'];?>" type="checkbox" class="remember_cb"></td>
<td><center><?php echo htmlspecialchars_decode($row['id'], ENT_QUOTES); ?></center>
</td>
<td style="padding-left:25px;margin:15px"><?php echo $_SESSION['question']=
htmlspecialchars_decode($row['question'], ENT_QUOTES); ?></center>
</td>
<td><center><?php echo htmlspecialchars_decode($row['correctAnswer'], ENT_QUOTES); ?>
</center></td>
<td><center><?php echo htmlspecialchars_decode($row['category'], ENT_QUOTES); ?>
</center></td>
<td><a href="<?php echo "manual_update.php?id=".$row['id']."&mode=update";?
>"id="dialog_10">View</a></td>
</tr>
<?php } ?>
<tr>
<td><strong>Select </strong></td>
<td><strong>Sr No </strong></td>
<td><strong>Question </strong></td>
<td><strong>CorrectAnswer </strong></td>
<td><strong>Category </strong></td>
<td><strong>View Details</strong></td>
</tr>
<?php
if($page > 1){
$prev = $page - 1;
$prev = " <a href='$targetpage&page=$prev'>prev</a> ";
} else {
$prev = "";
}
if($page < $num_pages){
$next = $page + 1;
$next = " <a href='$targetpage&page=$next'>next</a> ";
}
else
{
$next = "";
}
echo $prev;
echo $next;
?>
paginate.js
var aa_checkbox;
function init_checkbox(){
//setup blank cb cookie
if(!Cookie.read('checkbox'))
{
Cookie.write('checkbox', JSON.encode({}));
}
//setup "associative array" to match what is currently in the cookie
aa_checkbox = JSON.decode(Cookie.read('checkbox'));
//set up each checkbox with class="remember_cb"
$$('input.remember_cb').each(function(el){
//mark checked if it is in the cookie
if(aa_checkbox[el.name]){
el.checked = 'checked'
}
//setup onclick event to put checkbox status in the
if(el.checked){
aa_checkbox[el.name] = 1;
}else{
delete(aa_checkbox[el.name]);
}
})
})
//save aa_checkbox back into cookie upon leaving a page
window.onbeforeunload = function(){Cookie.write('cb',
JSON.encode(aa_checkbox));};
setup_form();
return true;
}
function setup_form(){
//set up form so that it adds the inputs upon submit.
$$('form.remember_cb_form').each(function(form){
form.addEvent('submit', function(ev){
//clean up previously inserted inputs
var aa_hidden_insert = $$('input.hidden_insert');
$each(aa_hidden_insert, function(el){
el.parentNode.removeChild(el);
})
var el_form = this;
//insert hidden elements representing the values stored in aa_checkbox
$each(aa_checkbox, function(i_value, s_name){
if(i_value){
var el_input = document.createElement('input');
el_input.type = 'hidden';
el_input.value = i_value;
el_input.name = s_name;
el_input.setAttribute('class', 'hidden_insert');
el_form.appendChild(el_input);
}
});
});
});
}
window.addEvent('domready', init_checkbox);
function selectall()
{
var selectAll = document.forms[0].length;
if(document.forms[0].topcheckbox.checked == true)
{
for(i=1;i<selectAll;i++)
{
document.forms[0].elements[i].checked = true;
}
}
else
{
for(i=1;i<selectAll;i++)
document.forms[0].elements[i].checked = false;
}
}
function goSelect()
{
var select = document.forms[0].length;
var checkboxes=""
for(i=1;i<select;i++)
{
if(document.forms[0].elements[i].checked==true)
checkboxes+= " " + document.forms[0].elements[i].name
}
if(checkboxes.length>0)
{
var con=confirm("You have selected ...........");
if(con)
{
window.location.assign("submit.php?recsno="+checkboxes)
}
}
else
{
alert("No record is selected.")
}
}