addTab: function() {

    $("#myTabs").tabs('add', {

        title: 'my title',

        closable: true,

        tools: [{

            iconCls: 'icon-mini-refresh',

            handler: function() {

                alert('refresh');

            }

        }]

    });

    var currentTabPanel = $("#tabsMain").tabs('getSelected');

    var dynamicTable = $('<table id="tbTest"></table>');

    //这里一定要先添加到currentTabPanel中，因为dynamicTable.datagrid()函数需要调用到parent函数

    currentTabPanel.html(dynamicTable);

    dynamicTable.datagrid({

            url:'datagrid_data.json',

            columns:[[

            {field:'code',title:'Code',width:100},

            {field:'name',title:'Name',width:100},

            {field:'price',title:'Price',width:100,align:'right'}

            ]]

        });

}