查询结果，分页显示数据错误

<div class='text-center'>
       <ul class='pagination'>
       <li><a>每页显示：<?php echo $pagesize;?>条共<?php echo $totalpage;?>页  当前第<?php echo $currpage;?>页, 共<?php echo $total;?>条记录 </a></li>
       <li><a>
<select name='page' size='1' id="page" onchange='javascript:submit()' class="form-control" >
<?php

for($i=1;$i<=$totalpage;$i++)

{

           ?>
<option value="<?php echo $i; ?>" <?php if ($currpage==$i) echo "selected"; ?>> 第<?php echo $i;?>页</option>
<?php }?>
</select>   </a></li>
       <li><?php if($currpage==1){?>
       <a >首页</a>  </li></li><li><a >上页</a></li>

       <?php } else {?>
       <li><a href="<?php echo $filename;?>&page=1">首页</a></li><li><a href="<?php echo $filename;?>&page=<?php echo ($currpage-1);?>">上一页</a></li>
       <?php }
if($currpage==$totalpage)
           {?>
       <li><a >下页</a></li></li><li><a >尾页</a></li>
       <?php }else{?>
           <li> <a href="<?php echo $filename;?>&page=<?php echo ($currpage+1);?>">下一页</a></li><li><a href="<?php echo $filename;?>&page=<?php echo $totalpage;?>">尾页</a></li>
           <?php }?>

</ul>
       </div>
</section>