contextmenu: function(grid, rowIndex, e) {
        e.preventDefault();
        e.stopEvent();
        var panelStore = grid.getStore();
        var record = grid.getStore().getAt(rowIndex);
        var params = '?fileNo=' + this.storeFileNo + '&foreignId=' + this.storeId;
        var menu01 = new Ext.menu.Item({
             iconCls : 'edit',
                id      : 'updateMenu',
                text    : '修改',
                handler : this.edit.createDelegate(this)
            
            
        });
        var menu02 = new Ext.menu.Item({
             iconCls : 'delete',
                id      : 'deleteMenu',
                text    : '删除',
                handler : this.del.createDelegate(this)
            
        });
        var menu03 = new Ext.menu.Item({
             iconCls : 'mod',
                id      : 'modMenu',
                text    : '配置菜单',
                handler : this.modifyMod.createDelegate(this)
        });

        var selections = this.getSelections();
        if (selections.length > 1) {
            menu01.disable();
          }
        
        var menuList = [menu01, menu02, menu03];

        this.grid_menu = new Ext.menu.Menu({
            id    : 'mainMenu',
            items: menuList
        });
        var coords = e.getXY();
        grid.getSelectionModel().selectRow(rowIndex);
        this.grid_menu.showAt([coords[0], coords[1]]);
    },