点击grid单元格弹出新窗口

实现功能：点击指定单元格后会弹出新窗口，并且最后一行合计不会触发单元格触发函数 

    <script type="text/javascript">
        grid.on('cellclick',function(grid, rowIndex, columnIndex, e){
                var selections = grid.getSelectionModel().getSelections();//获取行
                var record = grid.getStore().getAt(rowIndex);  //Get the Record
                var fieldName = grid.getColumnModel().getDataIndex(columnIndex); //获取字段名称
                var nbbm = record.get("Id");//获取字段id的值
                if(rowIndex < selections.length){//当前行数不是最后一行时
                    if(fieldName=='m'){//当字段名为m的单元格点击触发
                        var newStore = new Ext.data.Store({
                                autoLoad :{params : {start:0,limit :10,id:id}},
                                reader: new Ext.data.JsonReader(
                                    {             
                                       totalProperty: "total",
                                       root: "data"
                                    },
                                    Ext.data.Record.create([
                                        {name:"id"},
                                        {name:"num"},
                                        {name:"mxbm"},
                                    {name:"time"}])),
                                proxy : new Ext.data.HttpProxy({
                                       url:"/servlet?action=m&id="+id
                                })
                        });
                        var newGrid=new Ext.grid.GridPanel({
                            viewConfig:{forceFit:true,autoScroll:true},
                            store:newStore,
                            height:300,
                            bodyStyle:'100%',
                            layout:"table",
                            border:"1",
                            columns:[
                                {header:"ID", dataIndex:"cashNBBM",hidden:true}, 
                                {header:"序号",dataIndex:"num"}, 
                                {header:"编码",dataIndex:"mxbm"},
                                {header:"日期",dataIndex:"time"}],
                            bbar:new Ext.PagingToolbar({
                                 emptyMsg:"没有数据",
                                 displayInfo:true,
                                 displayMsg:"目前显示第 {0} - {1} 条，共 {2} 条",
                                 store:newStore,
                                 pageSize:10,
                                 refreshText:"刷新列表"
                             })
                        });
                        var newWin = new Ext.Window({
                            title:"新窗口",
                            //el:'window-win',
                            layout:'fit',
                            800,
                            height:400,
                            items: [newGrid]
                        }); 
                        newWin.show(); 
                    }
               }
          }
    </script>