Ext 设立CheckboxSelectionModel数据选中

var recordIds=new Array();// 选中的Record主键列id列表  
var recordsChecked=new Array();// 选中的Record列表  
  
var store = new Ext.data.JsonStore({  
                url : 'viewXXX.do',  
                pruneModifiedRecords : true,  
                totalProperty : 'totalProperty',  
                root : 'root',  
                fields : [{name : 'id'},   
                          {name : 'status'}  
                          ],  
                listeners : {  
                    load : function() {  
                        var records = new Array();  
                        store.each(function(record) {  
                            if (recordIds.contains(record.data.id))  
                                 records.push(record);  
                        });  
                        selMod.selectRecords(records, true);// 以后每次load数据时，都会默认选中  
                    }  
                }  
            });  
      
    var selMod = new Ext.grid.CheckboxSelectionModel({  
        handleMouseDown : Ext.emptyFn,  
                listeners : {  
                    "rowdeselect" : {  
                        fn : function(e, rowIndex, record) {  
                            if (recordIds.contains(record.data.id)) {  
                                recordIds.remove(record.data.id);  
                                recordsChecked.remove(record);  
                            }  
                        }  
                    },  
                    "rowselect" : {  
                        fn : function(e, rowIndex, record) {  
                            if (!recordIds.contains(record.data.id))  
                                recordIds.push(record.data.id);  
                            recordsChecked.push(record);  
                        }  
                    }  
                }  
            });