关于PHP+jQuery-ui拖动浮动层排序并保存到数据库实例

<script type="text/javascript" src="jquery.js"></script>  

<script type='text/javascript' src='js/jquery-ui.min.js'></script>

<div id="loader"></div>  

<div id="module_list">  

<input type="hidden" id="orderlist" value="<?php echo $sort; ?>" />  

   <!--?php 

                for ($i = 0; $i < $len; $i++) { 

                    ?-->  

   <div class="modules" title="<?php echo $sort_arr[$i]; ?>">  

    <h3 class="m_title">module: 

     <!--?php echo $sort_arr[$i]; ?--></h3>  

    <p> 

     <!--?php echo $sort_arr[$i]; ?--></p>  

   </div>  

   <!--?php } ?-->  

   <div class="cl"></div>  

</div>

$(function() { 

    $(".m_title").bind('mouseover', 

    function() { 

        $(this).css("cursor", "move") 

    }); 

  

    var $show = $("#loader"); //进度条 

    var $orderlist = $("#orderlist"); 

    var $list = $("#module_list"); 

  

    $list.sortable({ 

        opacity: 0.6, 

        revert: true, 

        cursor: 'move', 

        handle: '.m_title', 

        update: function() { 

            var new_order = []; 

            $list.children(".modules").each(function() { 

                new_order.push(this.title); 

            }); 

            var newid = new_order.join(','); 

            var oldid = $orderlist.val(); 

            $.ajax({ 

                type: "post", 

                url: "update.php", 

                data: { 

                    id: newid, 

                    order: oldid 

                }, 

                //id:新的排列对应的id,order：原排列顺序 

                beforesend: function() { 

                    $show.html("<img src='images/load.gif' /> 正在更新"); 

                }, 

                success: function(msg) { 

                    $show.html(""); 

                } 

            }); 

        } 

    }); 

});

$order = $_post['order']; 

$itemid = trim($_post['id']); 

if (!empty($itemid)) { 

    if ($order != $itemid) { 

        $query = mysql_query("update sortlist set sort='$itemid' where id=1"); 

        if ($query) { 

            echo $itemid; 

        } else { 

            echo "none"; 

        } 

    } 

}