jquery save checkbox to input type

i try to get value from multiple checkbox value. everything is fine until i try to move to next page. when i move to next page value from checkbox before was replace by new one from other page. this is my code:

 <?php 
    if(count($data) > 0){
      $no=0;
      foreach($data as $r){?>
        <tr valign="top">
          <td><input type="checkbox" name="customer_id[]" class="chkbox" id="customer_id" value="<?php echo $r->CUSTOMER_ID;?>"   style="margin:10px"/></td>
          <td><?php echo ++$no;;?></td>
          <td><?php echo $r->CUSTOMER_NAME;?></td>
          <td><?php echo $r->ATTENTION_TO;?></td>
          <td><?php echo $r->ADDRESS;?></td>
          <td><?php echo $r->PHONE_NUMBER;?></td>
          <td><?php echo $r->ZIP_CODE;?></td>
          <td align="right">
              <?php link_action($links_table_item,$r->CUSTOMER_ID);?>
          </td>

        </tr>
    <?php } 
    }
    ?>
<form name ="sample" >
<input type="text" name="textname"  id="txtValue" class="DISTRIBUTION">
</form>

this my javascript:

$(".chkbox").change(function () {
            setValue();
        });

        function setValue() {
            var items = $(".chkbox");
            var result = [];
            for (var i = 0; i < items.length; i++) {
                var item = $(items[i]);
                if (item.is(":checked")) {
                    result.push(item.val());
                }
            }
            var text = result.join(",");
            $(".DISTRIBUTION").val(text);
        }