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:'width: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',
                             width:800,
                             height:400,
                             items: [newGrid]
                         });
                         newWin.show();
                     }
                }
           }
     </script>

点击单元格触发