jquery easyui控件事件监听委托给jquery事件监听，keyup取最新值问题

<div id="<?php echo NS; ?>toolbar">

    <div style="padding:5px">

        <form id="<?php echo NS; ?>searchform">

            <span>订单号:</span>

            <input class="easyui-textbox" id="sn" name="sn" data-options="iconCls:'icon-ok',prompt:'订单号'" style="width:200px">

            <label>

                <a href="#" class="easyui-linkbutton" data-options="text: '搜索', iconCls:'icon-search'" onclick="<?php echo NS; ?>search()"/>

            </label>

        </form>

    </div>

</div>

<p></p><p></p>

<!--AJAX数据填html模板-->

<div id="<?php echo NS;?>dataview_template" style="display:none">

<div style="margin-bottom:5px;font-size:14px;border-bottom:1px solid #ccc">

   订单详情

  </div>

  <table cellspacing="12" style="border-color:#3399ff;padding:0;margin:0;width:100%;height:30px;">

   <tbody>

    <tr>

     <td>订单ID：</td>

     <td>{{id}} </td>

     <td>序号：</td>

     <td>{{sn}} </td>

     <td>标题描述：</td>

     <td>{{title}} </td>

    </tr>

    <tr>

     <td>订单类型：</td>

     <td>{{_type}} </td>

     <td>订单城市：</td>

     <td>{{_cityid}} </td>

     <td>总价：</td>

     <td>{{sumprice}} </td>

    </tr>

    <tr>

     <td>成本价：</td>

     <td>{{cosprice}} </td>

     <td>支付价：</td>

     <td>{{payprice}} </td>

     <td>状态：</td>

     <td>{{_status}} </td>

    </tr>

    <tr>

     <td>支付时间：</td>

     <td>{{paytime}} </td>

     <td>会员名称：</td>

     <td>{{_memberid}} </td>

     <td>机构名称：</td>

     <td>{{_corperid}} </td>

    </tr>

    <tr>

     <td>订单来源：</td>

     <td>{{_platid}} </td>

     <td>添加时间</td>

     <td>{{_addtime}} </td>

     <td>联系人手机号</td>

     <td>{{contactmobile}} </td>

    </tr>

   </tbody>

  </table>

</div>

<!--AJAX数据填充容器-->

<div id="<?php echo NS;?>dataview" style='margin:0;padding:20px 50px' data-options='novalidate:true'></div>

<script type="text/javascript">

    $(document).ready(function(){

        $('#sn').textbox({

            inputEvents: $.extend({},$.fn.textbox.defaults.inputEvents,{

                keyup:function(event){

                    alert($(this).val());

                 },

                click:function(event){

                    alert($(this).val());

                }

             })

        });

    });

    //JS占位符替换

    String.prototype.format = function() {

        if(arguments.length === 0) return this;

        var obj = arguments[0];

        var s = this;

        for(var key in obj) {

            s = s.replace(new RegExp("\\{\\{" + key + "\\}\\}", "g"), obj[key]);

        }

        return s;

    };

    //点击搜索操作按钮

    function <?php echo NS; ?>search() {

        //格式化键值对name:value

        var param = {};

        $.each($("#<?php echo NS; ?>searchform").serializeArray(), function () {

            param[this['name']] = this['value'];

        });

        $.ajax({

            type: 'POST',

            url: '/orders/order/ajax_index/'+param.sn,

            dataType: "json",

            beforeSend: function (xhr) {$.messager.progress();},

            success: function (res) {

                $.messager.progress('close');

                if (res.status == 200) {

                    //$.messager.alert('操作提示', res.msg, 'info');

                    //console.log(res.data.id);

                    //数据填充

                    $("#<?php echo NS; ?>dataview").html($("#<?php echo NS; ?>dataview_template").html().format(res.item));

                    return true;

                }

                $("#<?php echo NS; ?>dataview").html('');

                $.messager.alert('操作提示', res.msg, 'error');

            }

        });

    }

</script>